fix: improve connection reliability with better handshake detection (#…

…133)

# Improve Claude connection reliability and queue processing

This PR enhances the connection handling and queue processing for Claude Code:

- Increases the connection wait delay from 200ms to 600ms to ensure Claude is fully ready before sending queued mentions
- Implements a more robust connection check that verifies WebSocket handshake completion
- Adds progressive polling after connection to ensure handshake is complete
- Increases the delay between sequential message sends to 25ms (from 10ms) to prevent overwhelming the WebSocket connection
- Adds more detailed logging for connection and queue processing states
- Implements a retry mechanism that polls until handshake completes when triggered by a new connection

These changes should significantly improve reliability when sending multiple mentions to Claude, especially immediately after connection.

Release: prepare v0.2.0 with comprehensive updates (#48)

docs: update README with newer diff view demonstration video

Change-Id: Ic526e5e56997fb81d748e68203756ad414c0e277
Signed-off-by: Thomas Kosiewski <tk@coder.com>