Add tabs to the right panel (#12672)

* Create new method for header button behaviour

With the introduction of tabs, the behaviour of the header buttons is
changed as follows:
- Close any right panel if open
- Open the correct right panel if no panel was open before

The old method (and behaviour) is retained as showOrHidePhase.

* Implement tabs in the right panel

There are three tabs: Info, People and Threads

* Remove unwanted code from RoomSummaryCard

- Remove the menu item for opening the memberlist since that is now
  taken of by the tabs.
- Remove the close button

* Remove code for focusing close button from tac item

See https://github.com/matrix-org/matrix-react-sdk/pull/12410

There's no longer a close button to focus so we instead focus the thread
tab. This is done in RightPaneltabs.tsx so we just need to remove this
code.

* Introduce a room info icon to the header

This was previously present in the legacy room header but not in the new
header.

* BaseCard changes

- Adds id, ariaLabelledBy and role props to implement tab accessibility.
- Adds hideHeaderButtons prop to hide header buttons (think back and
  close buttons).
- Change confusing header rendering code:
  header is not rendered ONLY when no header is passed AND
  hideHeaderButtons is true.

* Refactor repeated code into function

Created a new function createSpaceScopeHeader which returns the
component if the room is a space room. Previously this code was
duplicated in every component that uses SpaceScopeHeader component.

* Pass BaseCard attributes and use helper function

Actually using the code from the last two commits

* Add, update and remove tests/screenshots/snapshots

* Fix distance between search bar and tabs

* Update compound

* Update screenshots/snapshots

playwright/e2e/spaces/threads-activity-centre/index.ts

@@ -337,12 +337,10 @@ export class Helpers {
     }
 
     /**
-     * Assert that the thread panel is focused (actually the 'close' button, specifically)
+     * Assert that the thread tab is focused
      */
-    assertThreadPanelFocused() {
-        return expect(
-            this.page.locator(".mx_ThreadPanel").locator(".mx_BaseCard_header").getByLabel("Close"),
-        ).toBeFocused();
+    assertThreadTabFocused() {
+        return expect(this.page.locator("#thread-panel-tab")).toBeFocused();
     }
 
     /**

playwright/e2e/spaces/threads-activity-centre/threadsActivityCentre.spec.ts

@@ -161,17 +161,12 @@ test.describe("Threads Activity Centre", () => {
         await util.assertNoTacIndicator();
     });
 
-    test("should focus the thread panel close button when clicking an item in the TAC", async ({
-        room1,
-        room2,
-        util,
-        msg,
-    }) => {
+    test("should focus the thread tab when clicking an item in the TAC", async ({ room1, room2, util, msg }) => {
         await util.receiveMessages(room1, ["Msg1", msg.threadedOff("Msg1", "Resp1")]);
 
         await util.openTac();
         await util.clickRoomInTac(room1.name);
 
-        await util.assertThreadPanelFocused();
+        await util.assertThreadTabFocused();
     });
 });