Add CMS failsafe setup menu

Located under the Features top-level menu. Allows configuring the failsafe procedure (like selecting GPS-RESCUE if applicable).

Bounded with `#ifdef USE_CMS_FAILSAFE_MENU` so it can be disabled for space critical targets.

src/main/flight/failsafe.c

@@ -72,6 +72,12 @@ PG_RESET_TEMPLATE(failsafeConfig_t, failsafeConfig,
     .failsafe_procedure = FAILSAFE_PROCEDURE_DROP_IT // default full failsafe procedure is 0: auto-landing
 );
 
+const char * const failsafeProcedureNames[FAILSAFE_PROCEDURE_COUNT] = {
+    "AUTO-LAND",
+    "DROP",
+    "GPS-RESCUE"
+};
+
 /*
  * Should called when the failsafe config needs to be changed - e.g. a different profile has been selected.
  */