Remove obsolete venvs directory and update .gitignore for uv

- Remove venvs/ directory which was only used as a placeholder for virtualenv
- Update .gitignore to use explicit .env/ and .venv/ patterns instead of *env
- Modernize ignore patterns for uv-based dependency management

🤖 Generated with [Claude Code](https://claude.ai/code)

.gitignore

@@ -3,10 +3,9 @@
 configs/*
 inventory_users
 *.kate-swp
-*env
+.env/
+.venv/
 .DS_Store
-venvs/*
-!venvs/.gitinit
 .vagrant
 .ansible/
 __pycache__/