feat: added implementation for new sidebar

[sundasnoreen12]

INF-1184

Description
Stack notifications panel on top of discussions based on Legacy Notifications vs Discussions Sidebar

When a user navigates to a unit, the sidebar should open when:

1. Audit user: Notification is available for the panel.
2. Audit user: Course is using Openedx provider and Discussion is enabled on this unit.
3. Audit user: Course is using Openedx provider and Discussion is enabled on this unit and Notification is available for the panel.
4. Verified user: Course is using Openedx provider and Discussion is enabled on this unit.

Sidebar should open irrespective of whether the user has closed it on the previous unit they visited.

Screenshots

[codecov]

Codecov Report

Attention: 103 lines in your changes are missing coverage. Please review.

Comparison is base (600f5b4) 87.98% compared to head (ba26b35) 86.24%.

Files	Patch %	Lines
...ware/course/new-sidebar/SidebarContextProvider.jsx	7.89%	35 Missing ⚠️
...-notifications/DiscussionsNotificationsTrigger.jsx	8.82%	31 Missing ⚠️
...urseware/course/new-sidebar/common/SidebarBase.jsx	14.28%	18 Missing ⚠️
.../courseware/course/new-sidebar/SidebarTriggers.jsx	14.28%	6 Missing ⚠️
src/courseware/course/new-sidebar/Sidebar.jsx	20.00%	4 Missing ⚠️
...-notifications/DiscussionsNotificationsSidebar.jsx	20.00%	4 Missing ⚠️
...re/course/new-sidebar/icons/RightSidebarFilled.jsx	50.00%	1 Missing ⚠️
.../course/new-sidebar/icons/RightSidebarOutlined.jsx	50.00%	1 Missing ⚠️
...otifications/notifications/NotificationsWidget.jsx	88.88%	1 Missing ⚠️
src/courseware/course/sequence/Sequence.jsx	80.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1260      +/-   ##
==========================================
- Coverage   87.98%   86.24%   -1.75%     
==========================================
  Files         276      290      +14     
  Lines        4745     4891     +146     
  Branches     1197     1234      +37     
==========================================
+ Hits         4175     4218      +43     
- Misses        554      657     +103     
  Partials       16       16              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.