feat: 多语言任务、WebUI 增强与 Agent MCP 集成

重构 lib 为扁平模块并支持 Windows schtasks；新增 JS/Bash/PowerShell 模板、WebUI 调度编辑，以及 Cursor Skill 与 MCP 工具供 Agent 管理定时任务。

Co-authored-by: Cursor <cursoragent@cursor.com>

mcp-server/pyproject.toml

@@ -0,0 +1,12 @@
+[project]
+name = "sproutclaw-cron-mcp"
+version = "0.1.0"
+description = "MCP server for SproutClaw Cron task management"
+requires-python = ">=3.10"
+dependencies = [
+    "fastmcp>=3.0",
+]
+
+[build-system]
+requires = ["setuptools>=61"]
+build-backend = "setuptools.build_meta"