Port of timer_face from legacy (#64)

- Closes https://github.com/joeycastillo/second-movement/issues/15
- Fixed issue with colon disappearing if exiting settings mode on the CLEAR or LOOP strings
- Use newer print function with fallback for classic display

movement_faces.h

@@ -63,6 +63,7 @@
 #include "tally_face.h"
 #include "probability_face.h"
 #include "ke_decimal_time_face.h"
+#include "timer_face.h"
 #include "simple_coin_flip_face.h"
 #include "lis2dw_monitor_face.h"
 #include "wareki_face.h"