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

firmware/targets/f7/furi_hal/furi_hal_bt_serial.c

@@ -0,0 +1,54 @@
+#include "furi_hal_bt_serial.h"
+#include "dev_info_service.h"
+#include "battery_service.h"
+#include "serial_service.h"
+
+#include <furi.h>
+
+void furi_hal_bt_serial_start() {
+    // Start device info
+    if(!dev_info_svc_is_started()) {
+        dev_info_svc_start();
+    }
+    // Start battery service
+    if(!battery_svc_is_started()) {
+        battery_svc_start();
+    }
+    // Start Serial service
+    if(!serial_svc_is_started()) {
+        serial_svc_start();
+    }
+}
+
+void furi_hal_bt_serial_set_event_callback(
+    uint16_t buff_size,
+    FuriHalBtSerialCallback callback,
+    void* context) {
+    serial_svc_set_callbacks(buff_size, callback, context);
+}
+
+void furi_hal_bt_serial_notify_buffer_is_empty() {
+    serial_svc_notify_buffer_is_empty();
+}
+
+bool furi_hal_bt_serial_tx(uint8_t* data, uint16_t size) {
+    if(size > FURI_HAL_BT_SERIAL_PACKET_SIZE_MAX) {
+        return false;
+    }
+    return serial_svc_update_tx(data, size);
+}
+
+void furi_hal_bt_serial_stop() {
+    // Stop all services
+    if(dev_info_svc_is_started()) {
+        dev_info_svc_stop();
+    }
+    // Start battery service
+    if(battery_svc_is_started()) {
+        battery_svc_stop();
+    }
+    // Start Serial service
+    if(serial_svc_is_started()) {
+        serial_svc_stop();
+    }
+}