Create correct directory structure and dependencies

This commit establishes the proper architecture for an HTTP transport wrapper around the official Gitea MCP server, replacing the incorrect standalone implementation.

New structure:
- src/gitea_http_wrapper/ (main package)
  - config/ (configuration loader)
  - middleware/ (HTTP auth middleware)
  - filtering/ (tool filtering for Claude Desktop)
  - tests/ (wrapper test suite)

Updated dependencies:
- mcp>=0.9.0 (MCP SDK for HTTP transport)
- uvicorn>=0.27.0 (ASGI server)
- pydantic>=2.0.0 (config validation)
- pydantic-settings>=2.0.0 (settings management)
- gitea-mcp-server>=0.1.0 (official Gitea MCP to wrap)

Created requirements.txt for Docker deployment convenience.

This architecture correctly separates concerns:
1. Official Gitea MCP server handles Gitea API operations
2. HTTP wrapper provides transport, auth, and filtering

Closes #10

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

requirements.txt

@@ -0,0 +1,9 @@
+# HTTP Transport Wrapper Dependencies
+mcp>=0.9.0
+uvicorn>=0.27.0
+pydantic>=2.0.0
+pydantic-settings>=2.0.0
+python-dotenv>=1.0.0
+
+# Official Gitea MCP Server (to be wrapped)
+gitea-mcp-server>=0.1.0