Add settings to hide images and videos in the timeline.

Hide images, videos and stickers in the timeline.
Disable click on hidden content. It must be revealed first.
Add preview without BlurHash.
Also hide image in thumbnails.

libraries/preferences/api/src/main/kotlin/io/element/android/libraries/preferences/api/store/AppPreferencesStore.kt

@@ -22,5 +22,8 @@ interface AppPreferencesStore {
     suspend fun setSimplifiedSlidingSyncEnabled(enabled: Boolean)
     fun isSimplifiedSlidingSyncEnabledFlow(): Flow<Boolean>
 
+    suspend fun setHideImagesAndVideos(value: Boolean)
+    fun doesHideImagesAndVideosFlow(): Flow<Boolean>
+
     suspend fun reset()
 }