Naming and coding style convention, new linter tool. (#945)

* Makefile, Scripts: new linter
* About: remove ID from IC
* Firmware: remove double define for DIVC/DIVR
* Scripts: check folder names too. Docker: replace syntax check with make lint.
* Reformat Sources and Migrate to new file naming convention
* Docker: symlink clang-format-12 to clang-format
* Add coding style guide

applications/bt/bt_cli.c

@@ -1,5 +1,5 @@
 #include <furi.h>
-#include <furi-hal.h>
+#include <furi_hal.h>
 #include <applications/cli/cli.h>
 #include <lib/toolbox/args.h>
 

applications/bt/bt_debug_app/bt_debug_app.c

@@ -1,5 +1,5 @@
 #include "bt_debug_app.h"
-#include <furi-hal-bt.h>
+#include <furi_hal_bt.h>
 
 #define TAG "BtDebugApp"
 

applications/bt/bt_debug_app/views/bt_carrier_test.c

@@ -1,7 +1,7 @@
 #include "bt_carrier_test.h"
 #include "bt_test.h"
 #include "bt_test_types.h"
-#include "furi-hal-bt.h"
+#include "furi_hal_bt.h"
 
 struct BtCarrierTest {
     BtTest* bt_test;

applications/bt/bt_debug_app/views/bt_packet_test.c

@@ -1,7 +1,7 @@
 #include "bt_packet_test.h"
 #include "bt_test.h"
 #include "bt_test_types.h"
-#include "furi-hal-bt.h"
+#include "furi_hal_bt.h"
 
 struct BtPacketTest {
     BtTest* bt_test;

applications/bt/bt_hid_app/bt_hid.c

@@ -1,6 +1,6 @@
 #include "bt_hid.h"
-#include <furi-hal-bt.h>
-#include <applications/notification/notification-messages.h>
+#include <furi_hal_bt.h>
+#include <applications/notification/notification_messages.h>
 
 #define TAG "BtHidApp"
 

applications/bt/bt_hid_app/views/bt_hid_keynote.c

@@ -1,7 +1,7 @@
 #include "bt_hid_keynote.h"
 #include <furi.h>
-#include <furi-hal-bt-hid.h>
-#include <furi-hal-usb-hid.h>
+#include <furi_hal_bt_hid.h>
+#include <furi_hal_usb_hid.h>
 #include <gui/elements.h>
 
 struct BtHidKeynote {

applications/bt/bt_hid_app/views/bt_hid_media.c

@@ -1,7 +1,7 @@
 #include "bt_hid_media.h"
 #include <furi.h>
-#include <furi-hal-bt-hid.h>
-#include <furi-hal-usb-hid.h>
+#include <furi_hal_bt_hid.h>
+#include <furi_hal_usb_hid.h>
 #include <gui/elements.h>
 
 struct BtHidMedia {

applications/bt/bt_service/bt.c

@@ -2,7 +2,7 @@
 #include "battery_service.h"
 #include "bt_keys_storage.h"
 
-#include <applications/notification/notification-messages.h>
+#include <applications/notification/notification_messages.h>
 
 #define TAG "BtSrv"
 

applications/bt/bt_service/bt_i.h

@@ -3,7 +3,7 @@
 #include "bt.h"
 
 #include <furi.h>
-#include <furi-hal.h>
+#include <furi_hal.h>
 
 #include <gui/gui.h>
 #include <gui/view_port.h>

applications/bt/bt_service/bt_keys_storage.c

@@ -1,6 +1,6 @@
 #include "bt_keys_storage.h"
 #include <furi.h>
-#include <file-worker.h>
+#include <file_worker.h>
 
 #define BT_KEYS_STORAGE_TAG "bt keys storage"
 #define BT_KEYS_STORAGE_PATH "/int/bt.keys"

applications/bt/bt_settings.c

@@ -1,6 +1,6 @@
 #include "bt_settings.h"
 #include <furi.h>
-#include <file-worker.h>
+#include <file_worker.h>
 
 #define TAG "BtSettings"
 #define BT_SETTINGS_PATH "/int/bt.settings"

applications/bt/bt_settings_app/bt_settings_app.h

@@ -6,7 +6,7 @@
 #include <gui/view_dispatcher.h>
 #include <gui/scene_manager.h>
 
-#include <gui/modules/variable-item-list.h>
+#include <gui/modules/variable_item_list.h>
 
 #include "../bt_settings.h"
 #include "scenes/bt_settings_scene.h"

applications/bt/bt_settings_app/scenes/bt_settings_scene_start.c

@@ -1,5 +1,5 @@
 #include "../bt_settings_app.h"
-#include "furi-hal-bt.h"
+#include "furi_hal_bt.h"
 
 enum BtSetting {
     BtSettingOff,