[WEB-1679] feat: issue detail widgets (#5034)

* chore: issue detail sidebar and main content improvement and code refactor

* dev: issue relation list component added

* chore: code refactor

* dev: issue detail widget implementation

* dev: update issue relation endpoint to return same response as sub issue

* chore: changed updated_by in issue attachment

* fix: peek view link ui

* chore: move collapsible button component to plane ui package

* chore: issue list component code refactor

* chore: relation icon updated

* chore: relation icon updated

* chore: issue quick action ui updated

* chore: wrap title indicatorElement component with useMemo

* chore: code refactor

* fix: build error

web/core/components/issues/sub-issues/issue-list-item.tsx

@@ -191,8 +191,6 @@ export const IssueListItem: React.FC<ISubIssues> = observer((props) => {
                 </CustomMenu.MenuItem>
               )}
 
-              <hr className="border-custom-border-300" />
-
               {disabled && (
                 <CustomMenu.MenuItem
                   onClick={() => {