feat: Open im.fluffychat uris

lib/config/app_config.dart

@@ -43,6 +43,7 @@ abstract class AppConfig {
   static const bool hideTypingUsernames = false;
   static const bool hideAllStateEvents = false;
   static const String inviteLinkPrefix = 'https://matrix.to/#/';
+  static const String deepLinkPrefix = 'im.fluffychat://chat/';
   static const String schemePrefix = 'matrix:';
   static const String pushNotificationsChannelId = 'fluffychat_push';
   static const String pushNotificationsChannelName = 'FluffyChat push channel';

lib/utils/url_launcher.dart

@@ -20,7 +20,8 @@ class UrlLauncher {
   const UrlLauncher(this.context, this.url);
 
   void launchUrl() {
-    if (url.toLowerCase().startsWith(AppConfig.inviteLinkPrefix) ||
+    if (url.toLowerCase().startsWith(AppConfig.deepLinkPrefix) ||
+        url.toLowerCase().startsWith(AppConfig.inviteLinkPrefix) ||
         {'#', '@', '!', '+', '\$'}.contains(url[0]) ||
         url.toLowerCase().startsWith(AppConfig.schemePrefix)) {
       return openMatrixToUrl();