* Add 4-character aliases for sendstring keycodes * Remove pointless mail keycode redefinition * Forgot brightness keycodes
* Clean up SEND_STRING keycodes and add media keys * Remove stray define * Add missing SEND_STRING keycodes for completeness Also, add KC_EJCT to the keycode references
* implement basic terminal stuff * modify send_string to read normal strings too * add files bc yeah. working pgm detected * pgm detection apparently not working * adds send string keycodes, additional keycode support in send string * implement arguments * [terminal] add help command * [terminal] adds keycode and keymap functions * [terminal] adds nop.h, documentation * update macro docs
