feat(schema): add double tap reaction to synced preferences (#2739)

packages/schema/proto/fluxer/user/preferences/v1/preferences.proto

@@ -49,6 +49,7 @@ message SyncedPreferences {
   KeybindSettings keybinds = 111;
   ChatInputSettings chat_input = 112;
   optional bool save_camera_uploads_to_device = 113;
+  ReactionEmoji double_tap_reaction = 114;
 
 }
 
@@ -262,3 +263,8 @@ enum MfaMethod {
 message ChatInputSettings {
   optional bool convert_emoticons = 1;
 }
+
+message ReactionEmoji {
+  optional string id = 1;
+  string name = 2;
+}