Replace repository with grok-reg-protocol-cpa project

Overwrite previous grok-keygen contents with the local registration/CPA protocol codebase (secrets and runtime data excluded).

.env.example

@@ -0,0 +1,11 @@
+# Grok 注册机 - 环境变量模板
+# 复制为 .env 并填入真实值
+# 注意：真实进程环境变量优先于 .env
+
+# CloudMail 管理后台
+CLOUDMAIL_URL=
+CLOUDMAIL_ADMIN_EMAIL=
+CLOUDMAIL_PASSWORD=
+
+# grok2api App Key
+GROK2API_APP_KEY=