Further source code rearrangement

Move auxiliary files to `src/kaleidoscope/plugin/MouseKeys` to not pollute the
`kaleidoscope/plugin` directory with headers not meant to be included directly.

Signed-off-by: Gergely Nagy <algernon@keyboard.io>

src/MouseWrapper.h

@@ -16,6 +16,6 @@
 
 #pragma once
 
-#warning Please migrate to including "kaleidoscope/plugin/MouseWrapper.h" instead of "MouseWrapper.h", or even consider dropping the include, because <Kaleidoscope-MouseKeys.h> will pull the right header in anyway.
+#warning The "MouseWrapper.h" header is deprecated, the same functionality is included by default when using <Kaleidoscope-MouseKeys.h>. It can be safely removed.
 
-#include "kaleidoscope/plugin/MouseWrapper.h"
+#include "kaleidoscope/plugin/MouseKeys/MouseWrapper.h"

src/kaleidoscope/plugin/MouseKeys.cpp

@@ -16,9 +16,8 @@
 
 #include <Arduino.h>
 
-#include "Kaleidoscope-MouseKeys.h"
-#include "MouseWrapper.h"
 #include "Kaleidoscope.h"
+#include "Kaleidoscope-MouseKeys.h"
 
 namespace kaleidoscope {
 namespace plugin {

src/kaleidoscope/plugin/MouseKeys.h

@@ -17,8 +17,9 @@
 #pragma once
 
 #include "Kaleidoscope.h"
-#include "MouseKeyDefs.h"
-#include "MouseWarpModes.h"
+#include "kaleidoscope/plugin/MouseKeys/MouseKeyDefs.h"
+#include "kaleidoscope/plugin/MouseKeys/MouseWarpModes.h"
+#include "kaleidoscope/plugin/MouseKeys/MouseWrapper.h"
 
 namespace kaleidoscope {
 namespace plugin {

src/kaleidoscope/plugin/MouseKeys/MouseWrapper.cpp

@@ -18,7 +18,7 @@
 // Mouse-related methods
 //
 //
-#include "MouseWrapper.h"
+#include "kaleidoscope/plugin/MouseKeys/MouseWrapper.h"
 #include "kaleidoscope/hid.h"
 
 namespace kaleidoscope {

src/kaleidoscope/plugin/MouseKeys/MouseWrapper.h

@@ -17,7 +17,7 @@
 #pragma once
 
 #include "Arduino.h"
-#include "MouseWarpModes.h"
+#include "kaleidoscope/plugin/MouseKeys/MouseWarpModes.h"
 
 // Warping commands