Stop using deprecated interfaces

Use `Kaleidoscope.use`, `Kaleidoscope.useEventHandlerHook`, and
`Kaleidoscope.useLoopHook` instead of the deprecated `USE_PLUGINS`,
`event_handler_hook_use`, and `loop_hook_use` interfaces.

Signed-off-by: Gergely Nagy <kaleidoscope@gergo.csillger.hu>

README.md

@@ -35,10 +35,10 @@ static const kaleidoscope::ShapeShifter::dictionary_t shape_shift_dictionary[] P
 };
 
 void setup() {
-  USE_PLUGINS(&ShapeShifter);
+  Kaleidoscope.use(&ShapeShifter);
 
   Kaleidoscope.setup();
-  
+
   ShapeShifter.dictionary = shape_shift_dictionary;
 }
 ```

examples/ShapeShifter/ShapeShifter.ino

@@ -46,7 +46,7 @@ static const kaleidoscope::ShapeShifter::dictionary_t shape_shift_dictionary[] P
 };
 
 void setup() {
-  USE_PLUGINS(&ShapeShifter);
+  Kaleidoscope.use(&ShapeShifter);
 
   Kaleidoscope.setup();
 

src/Kaleidoscope/ShapeShifter.cpp

@@ -28,8 +28,8 @@ ShapeShifter::ShapeShifter(void) {
 }
 
 void ShapeShifter::begin(void) {
-  event_handler_hook_use(eventHandlerHook);
-  loop_hook_use(loopHook);
+  Kaleidoscope.useEventHandlerHook(eventHandlerHook);
+  Kaleidoscope.useLoopHook(loopHook);
 }
 
 void ShapeShifter::loopHook(bool is_post_clear) {