Initial commit: Tablet lending system with user-tablet many-to-many relationship

- Database schema: tablets, users, loans (junction table)
- CLI app: minimal_app.py
- Web apps: app.py (Flask), simple_app.py (http.server)
- Features: loan management, search, user loans view, project notes
- Git structure: CONTRIBUTING.md, .gitignore

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

main.py

@@ -0,0 +1,6 @@
+def main():
+    print("Hello from gestiontablets!")
+
+
+if __name__ == "__main__":
+    main()