[FL-2119] BT HID App (#888)

* view_dispatcher: add default back processing for Long events
* assets: add ble connected and disconnected assets
* bt keyboard: introduce new application
* bt keyboard: add logic to keyboard mode
* bt: remove debug ble hid application
* bt hid: introduce media controller
* gui canvas: rename CanvasFontDirection -> CanvasDirection
* gui canvas: add arrow element
* assets: update finilized assets
* bt hid: finalise keynote GUI
* bt hid: finalise media player GUI
* bt: add media key buttons support
* bt: add exit confirm view
* bt: change Clicker -> Remote
* bt: support f6 target
* bt: hopefully final bt hid design
* bt hid: add blue led notification when device is connected
* bt: leave only bt clicker for now
* bt: add display notification on pin code show event

firmware/targets/furi-hal-include/furi-hal-bt-hid.h

@@ -3,6 +3,17 @@
 #include <stdint.h>
 #include <stdbool.h>
 
+enum FuriHalBtHidMediKeys{
+    FuriHalBtHidMediaScanNext,
+    FuriHalBtHidMediaScanPrevious,
+    FuriHalBtHidMediaStop,
+    FuriHalBtHidMediaEject,
+    FuriHalBtHidMediaPlayPause,
+    FuriHalBtHidMediaMute,
+    FuriHalBtHidMediaVolumeUp,
+    FuriHalBtHidMediaVolumeDown,
+};
+
 /** Start Hid Keyboard Profile
  */
 void furi_hal_bt_hid_start();
@@ -11,7 +22,7 @@ void furi_hal_bt_hid_start();
  */
 void furi_hal_bt_hid_stop();
 
-/** Press key button
+/** Press keyboard button
  *
  * @param button    button code from HID specification
  *
@@ -19,7 +30,7 @@ void furi_hal_bt_hid_stop();
  */
 bool furi_hal_bt_hid_kb_press(uint16_t button);
 
-/** Release key button
+/** Release keyboard button
  *
  * @param button    button code from HID specification
  *
@@ -27,8 +38,26 @@ bool furi_hal_bt_hid_kb_press(uint16_t button);
  */
 bool furi_hal_bt_hid_kb_release(uint16_t button);
 
-/** Release all key buttons
+/** Release all keyboard buttons
  *
  * @return          true on success
  */
 bool furi_hal_bt_hid_kb_release_all();
+
+/** Release all media buttons
+ *
+ * @return          true on success
+ */
+bool furi_hal_bt_hid_media_press(uint8_t button);
+
+/** Release all media buttons
+ *
+ * @return          true on success
+ */
+bool furi_hal_bt_hid_media_release(uint8_t button);
+
+/** Release all media buttons
+ *
+ * @return          true on success
+ */
+bool furi_hal_bt_hid_media_release_all();