Polish & delabs Exploring public spaces feature (#11423)

* Iterate search public spaces UX

* Tweak iconography in spotlight

* Delabs `Exploring public spaces`

* Tweak msc3827 v1.4 support discovery

* i18n

* Delete stale test

* Fix tests

* Iterate

* Iterate PR based on review

* Improve types

* Add shortcut to search for public spaces to create space menu

* Update import

* Add org.matrix.msc3827.stable filtering

* Fix tests

* silence some errors

src/hooks/spotlight/useDebouncedCallback.ts

@@ -20,7 +20,7 @@ const DEBOUNCE_TIMEOUT = 100;
 
 export function useDebouncedCallback<T extends any[]>(
     enabled: boolean,
-    callback: (...params: T) => void,
+    callback: (...params: T) => unknown,
     params: T,
 ): void {
     useEffect(() => {