feat: Add MCPB bundle for Claude Desktop installation (#112)

* feat: Add MCPB bundle for Claude Desktop installation

Add Model Context Protocol Bundle (MCPB) support enabling single-click
installation in Claude Desktop and other MCP hosts.

Changes:
- Add manifest.json with uvx-based server configuration
- Add icon.png for display in Claude Desktop
- Add .mcpbignore for build exclusions
- Add pre-built excel-mcp-server-0.1.7.mcpb bundle

🤖 Generated with [Claude Code](https://claude.com/claude-code)

* feat: Add documentation URLs to manifest

Add homepage, documentation, and support URLs for MCP Directory compliance.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: triepod-ai <199543909+triepod-ai@users.noreply.github.com>

.mcpbignore

@@ -0,0 +1,57 @@
+# Exclude everything except manifest and icon (uvx pattern)
+# The uvx command downloads the package from PyPI at runtime
+
+# Python source files
+*.py
+*.pyc
+*.pyo
+__pycache__/
+
+# Package files
+*.toml
+*.lock
+*.txt
+*.cfg
+*.ini
+
+# Source directories
+src/
+tests/
+docs/
+
+# Assets (icon is copied to root)
+assets/
+
+# Documentation
+*.md
+!README.md
+
+# Build artifacts
+*.egg-info/
+dist/
+build/
+.eggs/
+
+# Environment
+.env*
+*.local
+.venv/
+venv/
+
+# IDE/Editor
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Git
+.git/
+.gitignore
+.gitattributes
+
+# CI/CD
+.github/
+
+# Misc
+.DS_Store
+Thumbs.db