Polish for public release: README badges, add pine_send_message to tools list

Author: bojieli

README.md

@@ -1,5 +1,8 @@
 # openclaw-pine
 
+[![npm version](https://img.shields.io/npm/v/openclaw-pine)](https://www.npmjs.com/package/openclaw-pine)
+[![license](https://img.shields.io/npm/l/openclaw-pine)](./LICENSE)
+
 OpenClaw channel plugin for Pine AI. Let Pine AI contact customer service for you.
 
 ## Install
@@ -43,6 +46,7 @@ message, not individual chunks — avoiding expensive per-chunk LLM calls.
 - `pine_sessions` — list, get, or delete sessions
 - `pine_social_share` — share task results on social media (earn credits)
 - `pine_upload_attachment` — upload evidence documents (bills, screenshots)
+- `pine_send_message` — send a message with attachments to a session
 
 ### Agent behavior: respond, stay silent, or ask the human