[WEB-4098] feat: noindex/nofollow (#7088)

* feat: noindex/nofollow

- On login: nofollow
- On app pages: noindex, nofollow

https://app.plane.so/plane/browse/WEB-4098/

- https://nextjs.org/docs/app/api-reference/file-conventions/layout
- https://nextjs.org/docs/app/building-your-application/routing/route-groups#creating-multiple-root-layouts
- https://nextjs.org/docs/app/api-reference/functions/generate-metadata#link-relpreload

* chore: address PR feedback

web/app/(all)/onboarding/page.tsx

@@ -0,0 +1,186 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { observer } from "mobx-react";
+import useSWR from "swr";
+// types
+import { USER_ONBOARDING_COMPLETED } from "@plane/constants";
+import { TOnboardingSteps, TUserProfile } from "@plane/types";
+// ui
+import { TOAST_TYPE, setToast } from "@plane/ui";
+// components
+import { LogoSpinner } from "@/components/common";
+import { InviteMembers, CreateOrJoinWorkspaces, ProfileSetup } from "@/components/onboarding";
+// constants
+import { USER_WORKSPACES_LIST } from "@/constants/fetch-keys";
+// helpers
+import { EPageTypes } from "@/helpers/authentication.helper";
+// hooks
+import { useUser, useWorkspace, useUserProfile, useEventTracker } from "@/hooks/store";
+// wrappers
+import { AuthenticationWrapper } from "@/lib/wrappers";
+import { WorkspaceService } from "@/plane-web/services";
+// services
+
+enum EOnboardingSteps {
+  PROFILE_SETUP = "PROFILE_SETUP",
+  WORKSPACE_CREATE_OR_JOIN = "WORKSPACE_CREATE_OR_JOIN",
+  INVITE_MEMBERS = "INVITE_MEMBERS",
+}
+
+const workspaceService = new WorkspaceService();
+
+const OnboardingPage = observer(() => {
+  // states
+  const [step, setStep] = useState<EOnboardingSteps | null>(null);
+  const [totalSteps, setTotalSteps] = useState<number | null>(null);
+  // store hooks
+  const { captureEvent } = useEventTracker();
+  const { isLoading: userLoader, data: user, updateCurrentUser } = useUser();
+  const { data: profile, updateUserProfile, finishUserOnboarding } = useUserProfile();
+  const { workspaces, fetchWorkspaces } = useWorkspace();
+
+  // computed values
+  const workspacesList = Object.values(workspaces ?? {});
+  // fetching workspaces list
+  const { isLoading: workspaceListLoader } = useSWR(USER_WORKSPACES_LIST, () => {
+    user?.id && fetchWorkspaces();
+  });
+  // fetching user workspace invitations
+  const { isLoading: invitationsLoader, data: invitations } = useSWR(
+    `USER_WORKSPACE_INVITATIONS_LIST_${user?.id}`,
+    () => {
+      if (user?.id) return workspaceService.userWorkspaceInvitations();
+    }
+  );
+  // handle step change
+  const stepChange = async (steps: Partial<TOnboardingSteps>) => {
+    if (!user) return;
+
+    const payload: Partial<TUserProfile> = {
+      onboarding_step: {
+        ...profile.onboarding_step,
+        ...steps,
+      },
+    };
+
+    await updateUserProfile(payload);
+  };
+
+  // complete onboarding
+  const finishOnboarding = async () => {
+    if (!user) return;
+
+    await finishUserOnboarding()
+      .then(() => {
+        captureEvent(USER_ONBOARDING_COMPLETED, {
+          // user_role: user.role,
+          email: user.email,
+          user_id: user.id,
+          status: "SUCCESS",
+        });
+      })
+      .catch(() => {
+        setToast({
+          type: TOAST_TYPE.ERROR,
+          title: "Failed",
+          message: "Failed to finish onboarding, Please try again later.",
+        });
+      });
+  };
+
+  useEffect(() => {
+    // Never update the total steps if it's already set.
+    if (!totalSteps && userLoader === false && workspaceListLoader === false) {
+      // If user is already invited to a workspace, only show profile setup steps.
+      if (workspacesList && workspacesList?.length > 0) {
+        // If password is auto set then show two different steps for profile setup, else merge them.
+        if (user?.is_password_autoset) setTotalSteps(2);
+        else setTotalSteps(1);
+      } else {
+        // If password is auto set then total steps will increase to 4 due to extra step at profile setup stage.
+        if (user?.is_password_autoset) setTotalSteps(4);
+        else setTotalSteps(3);
+      }
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [userLoader, workspaceListLoader]);
+
+  // If the user completes the profile setup and has workspaces (through invitations), then finish the onboarding.
+  useEffect(() => {
+    if (userLoader === false && profile && workspaceListLoader === false) {
+      const onboardingStep = profile.onboarding_step;
+      if (onboardingStep.profile_complete && !onboardingStep.workspace_create && workspacesList.length > 0)
+        finishOnboarding();
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [userLoader, profile, workspaceListLoader]);
+
+  useEffect(() => {
+    const handleStepChange = async () => {
+      if (!user) return;
+
+      const onboardingStep = profile.onboarding_step;
+
+      if (!onboardingStep.profile_complete) setStep(EOnboardingSteps.PROFILE_SETUP);
+
+      if (
+        onboardingStep.profile_complete &&
+        !(onboardingStep.workspace_join || onboardingStep.workspace_create || workspacesList?.length > 0)
+      ) {
+        setStep(EOnboardingSteps.WORKSPACE_CREATE_OR_JOIN);
+      }
+
+      if (
+        onboardingStep.profile_complete &&
+        (onboardingStep.workspace_join || onboardingStep.workspace_create) &&
+        !onboardingStep.workspace_invite
+      )
+        setStep(EOnboardingSteps.INVITE_MEMBERS);
+    };
+
+    handleStepChange();
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [user, step, profile.onboarding_step, updateCurrentUser, workspacesList]);
+
+  return (
+    <AuthenticationWrapper pageType={EPageTypes.ONBOARDING}>
+      {user && totalSteps && step !== null && !invitationsLoader ? (
+        <div className={`flex h-full w-full flex-col`}>
+          {step === EOnboardingSteps.PROFILE_SETUP ? (
+            <ProfileSetup
+              user={user}
+              totalSteps={totalSteps}
+              stepChange={stepChange}
+              finishOnboarding={finishOnboarding}
+            />
+          ) : step === EOnboardingSteps.WORKSPACE_CREATE_OR_JOIN ? (
+            <CreateOrJoinWorkspaces
+              invitations={invitations ?? []}
+              totalSteps={totalSteps}
+              stepChange={stepChange}
+              finishOnboarding={finishOnboarding}
+            />
+          ) : step === EOnboardingSteps.INVITE_MEMBERS ? (
+            <InviteMembers
+              finishOnboarding={finishOnboarding}
+              totalSteps={totalSteps}
+              user={user}
+              workspace={workspacesList?.[0]}
+            />
+          ) : (
+            <div className="flex h-full w-full items-center justify-center">
+              Something Went wrong. Please try again.
+            </div>
+          )}
+        </div>
+      ) : (
+        <div className="grid h-screen w-full place-items-center">
+          <LogoSpinner />
+        </div>
+      )}
+    </AuthenticationWrapper>
+  );
+});
+
+export default OnboardingPage;