feat(gitea): add pip-installable packaging for external consumption

Extract tool definitions and dispatcher from server.py into tool_registry.py
to enable transport-agnostic reuse. External consumers (e.g., HTTP transport
in gitea-mcp-remote) can now import and use the Gitea MCP tools without
duplicating code.

Changes:
- Create pyproject.toml with PEP 621 compliant package manifest (hatchling)
- Create tool_registry.py with get_tool_definitions() and create_tool_dispatcher()
- Refactor server.py to use registry (1100 -> 93 lines)
- Update __init__.py with package exports and __version__

The tool_filter parameter enables selective tool exposure for remote servers.
Stdio transport behavior is unchanged - all 36 tools still work identically.

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

mcp-servers/gitea/pyproject.toml

@@ -0,0 +1,39 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "gitea-mcp-server"
+version = "1.0.0"
+description = "MCP Server for Gitea integration - provides issue, label, wiki, milestone, dependency, and PR tools"
+readme = "README.md"
+requires-python = ">=3.10"
+license = "MIT"
+authors = [
+    { name = "Leo Miranda" }
+]
+keywords = ["mcp", "gitea", "claude", "tools"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+]
+dependencies = [
+    "mcp>=0.9.0",
+    "python-dotenv>=1.0.0",
+    "requests>=2.31.0",
+    "pydantic>=2.5.0",
+]
+
+[project.optional-dependencies]
+test = [
+    "pytest>=7.4.3",
+    "pytest-asyncio>=0.23.0",
+]
+
+[tool.hatch.build.targets.wheel]
+packages = ["mcp_server"]