⚙️ feat: Add Command Rate Limiting

[evolvewithevan]

⚙️ feat: Add Command Rate Limiting

Description:
Implement rate limiting to prevent abuse or spam of bot commands. This will ensure more stable operation and discourage rapid or repeated triggering of commands.

Goals:

• Limit how many commands a user can run in a given timeframe (e.g. 5 commands per 10 seconds).
• Possibly differentiate between regular users and admins/mods.
• Return a friendly error message when a user is rate-limited.

Checklist:

• Define rate-limiting strategy (per-user, global, per-command, etc.)
• Configurable limit values (e.g. via YAML or env vars)
• Implement rate-limiting middleware or decorator
• Add clear error message for rate-limited users
• Tests to verify limits are enforced correctly

Priority: High