docs: add .env.example to refer

Ang-dot · Ang-dot · commit 8424e4f6a9ae · 2025-05-06T15:39:57.000+08:00
diff --git a/plugins/twitter/examples/.env.example b/plugins/twitter/examples/.env.example
@@ -0,0 +1,7 @@
+GAME_TWITTER_ACCESS_TOKEN=apx-<game-twitter-access-token>
+
+TWITTER_BEARER_TOKEN=<twitter-bearer-token>
+TWITTER_API_KEY=<twitter-api-key>
+TWITTER_API_SECRET_KEY=<twitter-api-secret-key>
+TWITTER_ACCESS_TOKEN=<twitter-access-token>
+TWITTER_ACCESS_TOKEN_SECRET=<twitter-access-token_secret>
