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/furi_hal_include/furi_hal_bt_serial.h

@@ -0,0 +1,40 @@
+#pragma once
+
+#include "serial_service.h"
+
+#define FURI_HAL_BT_SERIAL_PACKET_SIZE_MAX SERIAL_SVC_DATA_LEN_MAX
+
+/** Serial service callback type */
+typedef SerialServiceEventCallback FuriHalBtSerialCallback;
+
+/** Start Serial Profile
+ */
+void furi_hal_bt_serial_start();
+
+/** Stop Serial Profile
+ */
+void furi_hal_bt_serial_stop();
+
+/** Set Serial service events callback
+ *
+ * @param buffer_size   Applicaition buffer size
+ * @param calback       FuriHalBtSerialCallback instance
+ * @param context       pointer to context
+ */
+void furi_hal_bt_serial_set_event_callback(
+    uint16_t buff_size,
+    FuriHalBtSerialCallback callback,
+    void* context);
+
+/** Notify that application buffer is empty
+ */
+void furi_hal_bt_serial_notify_buffer_is_empty();
+
+/** Send data through BLE
+ *
+ * @param data  data buffer
+ * @param size  data buffer size
+ *
+ * @return      true on success
+ */
+bool furi_hal_bt_serial_tx(uint8_t* data, uint16_t size);