♻️ Add support for `pip install "fastapi[standard]"` with standard dependencies and `python -m fastapi` (#11935)
* ♻️ Add support for `pip install "fastapi[standard]"` and make `fastapi` not include the optional standard dependencies
* 📝 Update docs to include new fastapi[standard]
* ✨ Add new stub fastapi command that tells people to install fastapi[standard]
* ✅ Add tests for new stub CLI
* 🔧 Add new command fastapi in main fastapi project, for when fastapi-cli is not installed
* ✏️ Fix types
* 📝 Add note about quotes when installing fastapi[standard]
* 📝 Update docs about standard extra dependencies
* ⬆️ Upgrade fastapi-cli
