feat: implement cute events

Cute events help against social distancing. You can send googly eyes,
hugs and cuddles.

Fixes:
https://rail.chat/@AgathaSorceress@eldritch.cafe/109336005433123570

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

lib/pages/chat/command_hints.dart

@@ -44,6 +44,12 @@ String commandHint(L10n l10n, String command) {
       return l10n.commandHint_markasdm;
     case 'markasgroup':
       return l10n.commandHint_markasgroup;
+    case 'googly':
+      return l10n.commandHint_googly;
+    case 'hug':
+      return l10n.commandHint_hug;
+    case 'cuddle':
+      return l10n.commandHint_cuddle;
     default:
       return "";
   }