✨ Add support for not needing `...` as default value in required Query(), Path(), Header(), etc. (#4906)
* ✨ Do not require default value in Query(), Path(), Header(), etc
* 📝 Update source examples for docs with default and required values
* ✅ Update tests with new default values and not required Ellipsis
* 📝 Update docs for Query params and update info about default value, required, Ellipsis
