Room list contextual menu (#427)

- Adds `ModalBottomSheet` to our design components (it wraps the homonimous Material3 one).
- Adds  a bottom sheet to the Room list using the aforementioned design component.
- Adds navigation from the room list to a room detail (context menu "Settings" action).
- Consolidates the "leave room flow" into a new `leaveroom` module used by both the room list and the room details.
  - Adds progress indicator to the leave room flow
- Uses new `leaveroom` module in `roomdetails` module too. 

Parent issue:
- https://github.com/vector-im/element-x-android/issues/261

features/roomdetails/impl/build.gradle.kts

@@ -45,6 +45,7 @@ dependencies {
     api(projects.libraries.usersearch.api)
     api(projects.services.apperror.api)
     implementation(libs.coil.compose)
+    implementation(projects.features.leaveroom.api)
 
     testImplementation(libs.test.junit)
     testImplementation(libs.coroutines.test)
@@ -54,6 +55,7 @@ dependencies {
     testImplementation(projects.libraries.matrix.test)
     testImplementation(projects.libraries.usersearch.test)
     testImplementation(projects.tests.testutils)
+    testImplementation(projects.features.leaveroom.fake)
 
     ksp(libs.showkase.processor)
 }