chore: bump version to 0.5.0 [skip-ci][skip-release]

Author: github-actions[bot]

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "claude-commit"
-version = "0.4.0"
+version = "0.5.0"
 description = "AI-powered git commit message generator using Claude Agent SDK"
 readme = "README.md"
 requires-python = ">=3.9"