New feature: DYNAMIC_TAPPING_TERM_ENABLE (#11036)

* New feature: `DYNAMIC_TAPPING_TERM_ENABLE`

3 new quantum keys to configure the tapping term on the fly.

* Replace sprintf call in tapping_term_report by get_u16_str

* Replace tab with 4 spaces

quantum/quantum.h

@@ -125,6 +125,10 @@ extern layer_state_t layer_state;
 #    include "process_auto_shift.h"
 #endif
 
+#ifdef DYNAMIC_TAPPING_TERM_ENABLE
+#    include "process_dynamic_tapping_term.h"
+#endif
+
 #ifdef COMBO_ENABLE
 #    include "process_combo.h"
 #endif