feat: streamline GitHub Actions workflows and improve contributor experience

- Replace complex auto-version.yml with simple PR Docker build workflow
  - Builds Docker images for all PRs using pr-number-sha tagging
  - Removes redundant versioning logic (semantic-release handles this)
  - Adds automatic PR comments with Docker usage instructions

- Optimize test.yml workflow triggers
  - Remove redundant push triggers on main branch
  - Focus on PR testing only for better developer feedback

- Add docker-release.yml for production releases
  - Triggers on GitHub release publication
  - Multi-platform builds (linux/amd64, linux/arm64)
  - Updates release notes with Docker installation instructions

- Add semantic-release.yml workflow for automated versioning
  - Uses conventional commits for version bumping
  - Automatically generates releases and tags
  - Integrates with Docker workflow via release triggers

- Add pre-commit configuration for automatic code quality
  - Includes ruff (with auto-fix), black, isort
  - Provides faster development workflow option

- Enhance contribution documentation
  - Add pre-commit hook option as recommended approach
  - Keep manual script option for comprehensive testing
  - Improve developer workflow guidance

Fixes #215 (automatic changelog generation)
Addresses #110 (Docker builds automation)
References #107 (improved version tracking)

This creates a clean, modern CI/CD pipeline that eliminates redundancy
while addressing multiple community requests around changelog generation,
Docker builds, and release automation.

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "zen-mcp-server"
-version = "0.1.0"
+version = "1.1.0"
 description = "AI-powered MCP server with multiple model providers"
 requires-python = ">=3.9"
 dependencies = [
@@ -83,6 +83,33 @@ ignore = [
 "tests/*" = ["B011"]
 "tests/conftest.py" = ["E402"]  # Module level imports not at top of file - needed for test setup
 
+[tool.semantic_release]
+version_toml = ["pyproject.toml:project.version"]
+branch = "main"
+build_command = "python -m pip install --upgrade build && python -m build"
+dist_path = "dist/"
+upload_to_vcs_release = true
+upload_to_repository = false
+remove_dist = false
+commit_version_number = true
+commit_message = "chore(release): {version}\n\nAutomatically generated by python-semantic-release"
+tag_format = "v{version}"
+
+[tool.semantic_release.branches.main]
+match = "main"
+prerelease = false
+
+[tool.semantic_release.changelog]
+exclude_commit_patterns = []
+
+[tool.semantic_release.commit_parser_options]
+allowed_tags = ["build", "chore", "ci", "docs", "feat", "fix", "perf", "style", "refactor", "test"]
+minor_tags = ["feat"]
+patch_tags = ["fix", "perf"]
+
+[tool.semantic_release.remote.token]
+env = "GH_TOKEN"
+
 [build-system]
 requires = ["setuptools>=45", "wheel", "setuptools_scm[toml]>=6.2"]
 build-backend = "setuptools.build_meta"