* Issue 9942: Add Quantum defines
Add codes to quantum_keycodes for LSA, RSA, RCS, and their corresponding _T macros
* 9942: Add documentation for new defines
Add documentation for new defines in feature request 9942. Also define SAGR and SAGR_T as aliases for RSA and RSA_T.
* Update quantum/quantum_keycodes.h
* Update docs/keycodes.md
* Update docs/keycodes.md
* Update docs/keycodes.md
* Update docs/keycodes.md