docs+release: MCP.md 工具参考与部署指南；0.2.0

Co-Authored-By: Claude <noreply@anthropic.com>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "ppclock"
-version = "0.1.0"
+version = "0.2.0"
 description = "4.2寸墨水屏设备离线 CLI 上位机（DA14585 BLE，agent 友好）"
 requires-python = ">=3.10"
 dependencies = [