Message Pinning via REST APIs

We would like to request support for message pinning and unpinning through REST APIs in CometChat.

Currently, message pinning is only available via the Pin Message Extension and is not accessible through REST API endpoints. This limits use cases that rely on backend-driven workflows and server-side control.

We propose adding endpoints to pin and unpin messages (e.g., POST /v3/messages/{messageId}/pin and DELETE /v3/messages/{messageId}/pin) so developers can manage pinned messages programmatically.