Add support for GeminiPR steno protocol.

This protocol breaks out "duplicate" keys into their own entry in the packet so that more complicated logic can be done on the software side, including support for additional languages and alternative theories.

tmk_core/common/eeconfig.c

@@ -19,6 +19,9 @@ void eeconfig_init(void)
 #ifdef RGBLIGHT_ENABLE
     eeprom_update_dword(EECONFIG_RGBLIGHT,      0);
 #endif
+#ifdef STENO_ENABLE
+    eeprom_update_byte(EECONFIG_STENOMODE,      0);
+#endif
 }
 
 void eeconfig_enable(void)

tmk_core/common/eeconfig.h

@@ -34,6 +34,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define EECONFIG_AUDIO                              (uint8_t *)7
 #define EECONFIG_RGBLIGHT                           (uint32_t *)8
 #define EECONFIG_UNICODEMODE                        (uint8_t *)12
+#define EECONFIG_STENOMODE                          (uint8_t *)13
 
 
 /* debug bit */

tmk_core/common/keyboard.c

@@ -51,6 +51,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef RGBLIGHT_ENABLE
 #   include "rgblight.h"
 #endif
+#ifdef STENO_ENABLE
+#   include "process_steno.h"
+#endif
 #ifdef FAUXCLICKY_ENABLE
 #   include "fauxclicky.h"
 #endif
@@ -139,6 +142,9 @@ void keyboard_init(void) {
 #ifdef RGBLIGHT_ENABLE
     rgblight_init();
 #endif
+#ifdef STENO_ENABLE
+    steno_init();
+#endif
 #ifdef FAUXCLICKY_ENABLE
     fauxclicky_init();
 #endif