feat(root): bump version to 0.3.0 and update dependencies

Update metadata and pin production dependencies for reproducible builds.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "devgen-cli"
-version = "0.2.9"
+version = "0.3.0"
 description = "A collection of developer tools"
 readme = "README.md"
 requires-python = ">=3.10"