feat: add commitizen configuration for automated version management

- Add commitizen to dev dependencies for semantic versioning
- Configure commitizen with conventional commits and poetry integration
- Set up automatic changelog generation and PEP440 version scheme
- Enable major version zero mode for pre-1.0 releases
- Update poetry.lock with new commitizen dependency

Signed-off-by: longhao <hal.long@outlook.com>

pyproject.toml

@@ -43,6 +43,7 @@ pytest-mock = "^3.12.0"
 ruff = "^0.1.0"
 pre-commit = "^3.6.0"
 nox = "^2025.0.0"
+commitizen = "^3.0.0"
 
 [tool.poetry.scripts]
 pypi-query-mcp-server = "pypi_query_mcp.server:main"
@@ -98,3 +99,11 @@ exclude_lines = [
     "if 0:",
     "if __name__ == .__main__.:",
 ]
+
+[tool.commitizen]
+name = "cz_conventional_commits"
+tag_format = "v$version"
+version_scheme = "pep440"
+version_provider = "poetry"
+update_changelog_on_bump = true
+major_version_zero = true