[WEB-5136] refactor: update admin ESLint configuration and refactor imports to use type imports (#7955)

- Enhanced ESLint configuration by adding new rules for import consistency and type imports.
- Refactored multiple files to replace regular imports with type imports for better clarity and performance.
- Ensured consistent use of type imports across the application to align with TypeScript best practices.

apps/admin/app/(all)/(dashboard)/general/form.tsx

@@ -1,12 +1,12 @@
 "use client";
-import { FC } from "react";
+import type { FC } from "react";
 import { observer } from "mobx-react";
 import { Controller, useForm } from "react-hook-form";
 import { Telescope } from "lucide-react";
 // types
 import { Button } from "@plane/propel/button";
 import { TOAST_TYPE, setToast } from "@plane/propel/toast";
-import { IInstance, IInstanceAdmin } from "@plane/types";
+import type { IInstance, IInstanceAdmin } from "@plane/types";
 // ui
 import { Input, ToggleSwitch } from "@plane/ui";
 // components

apps/admin/app/(all)/(dashboard)/general/intercom.tsx

@@ -1,10 +1,11 @@
 "use client";
 
-import { FC, useState } from "react";
+import type { FC } from "react";
+import { useState } from "react";
 import { observer } from "mobx-react";
 import useSWR from "swr";
 import { MessageSquare } from "lucide-react";
-import { IFormattedInstanceConfiguration } from "@plane/types";
+import type { IFormattedInstanceConfiguration } from "@plane/types";
 import { ToggleSwitch } from "@plane/ui";
 // hooks
 import { useInstance } from "@/hooks/store";

apps/admin/app/(all)/(dashboard)/general/layout.tsx

@@ -1,5 +1,5 @@
-import { ReactNode } from "react";
-import { Metadata } from "next";
+import type { ReactNode } from "react";
+import type { Metadata } from "next";
 
 export const metadata: Metadata = {
   title: "General Settings - God Mode",