* 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
|`MT(mod, kc)`| |`mod` when held, `kc` when tapped |
|`LCTL_T(kc)` |`CTL_T(kc)` |Left Control when held, `kc` when tapped |
|`LSFT_T(kc)` |`SFT_T(kc)` |Left Shift when held, `kc` when tapped |
@ -412,14 +415,17 @@ See also: [Mod-Tap](mod_tap.md)
|`LGUI_T(kc)` |`LCMD_T(kc)`, `LWIN_T(kc)`, `GUI_T(kc)`, `CMD_T(kc)`, `WIN_T(kc)`|Left GUI when held, `kc` when tapped |
|`RCTL_T(kc)` | |Right Control when held, `kc` when tapped |
|`RSFT_T(kc)` | |Right Shift when held, `kc` when tapped |
|`RALT_T(kc)` |`ROPT_T(kc)`, `ALGR_T(kc)` |Right Alt when held, `kc` when tapped |
|`RALT_T(kc)` |`ROPT_T(kc)`, `ALGR_T(kc)` |Right Alt (AltGr) when held, `kc` when tapped |
|`RGUI_T(kc)` |`RCMD_T(kc)`, `RWIN_T(kc)` |Right GUI when held, `kc` when tapped |
|`SGUI_T(kc)` |`SCMD_T(kc)`, `SWIN_T(kc)` |Left Shift and GUI when held, `kc` when tapped |
|`LCA_T(kc)` | |Left Control and Alt when held, `kc` when tapped |
|`LSA_T(kc)` | |Left Shift and Left Alt when held, `kc` when tapped |
|`RSA_T(kc)` |`SAGR_T(kc)` |Right Shift and Right Alt (AltGr) when held, `kc` when tapped |
|`RCS_T(kc)` | |Right Control and Right Shift when held, `kc` when tapped |
|`LCAG_T(kc)` | |Left Control, Alt and GUI when held, `kc` when tapped |
|`RCAG_T(kc)` | |Right Control, Alt and GUI when held, `kc` when tapped |
|`C_S_T(kc)` | |Left Control and Shift when held, `kc` when tapped |
|`MEH_T(kc)` | |Left Control, Shift and Alt when held, `kc` when tapped|
|`MEH_T(kc)` | |Left Control, Shift and Alt when held, `kc` when tapped|
|`HYPR_T(kc)` |`ALL_T(kc)` |Left Control, Shift, Alt and GUI when held, `kc` when tapped - more info [here](http://brettterpstra.com/2012/12/08/a-useful-caps-lock-key/)|