[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>

packages/tailwind-config-custom/tailwind.config.js

@@ -289,6 +289,7 @@ module.exports = {
       },
       // scale down font sizes to 90% of default
       fontSize: {
+        "2xs": "0.5625rem",
         xs: "0.675rem",
         sm: "0.7875rem",
         base: "0.9rem",