[WEB-2442] feat: Revamp Timeline Layout (#5915)

* chore: added issue relations in issue listing

* chore: added pagination for issue detail endpoint

* chore: bulk date update endpoint

* chore: appended the target date

* chore: issue relation new types defined

* fix: order by and issue filters

* fix: passed order by in pagination

* chore: changed the key for issue dates

* Revamp Timeline Layout

* fix block dragging

* minor ui fixes

* improve auto scroll UX

* remove unused import

* fix timeline layout heights

* modify base timeline store

* Segregate issue relation types

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Co-authored-by: NarayanBavisetti <narayan3119@gmail.com>

web/core/components/ui/loader/layouts/gantt-layout-loader.tsx

@@ -1,6 +1,14 @@
 import { Row } from "@plane/ui";
+import { BLOCK_HEIGHT } from "@/components/gantt-chart/constants";
 import { getRandomLength } from "../utils";
 
+export const GanttLayoutLIstItem = () => (
+  <div className="flex flex w-full items-center gap-4 px-6 " style={{ height: `${BLOCK_HEIGHT}px` }}>
+    <div className="px-3 h-6 w-8 bg-custom-background-80 rounded" />
+    <div className={`px-3 h-6 w-${getRandomLength(["32", "52", "72"])} bg-custom-background-80 rounded`} />
+  </div>
+);
+
 export const GanttLayoutLoader = () => (
   <div className="flex flex-col h-full overflow-x-auto animate-pulse">
     <div className="min-h-10 w-full border-b border-custom-border-200 ">