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/f6/furi_hal/furi_hal_usb_i.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "usb.h"
+
+#define USB_EP0_SIZE 8
+
+/* String descriptors */
+enum UsbDevDescStr {
+    UsbDevLang = 0,
+    UsbDevManuf = 1,
+    UsbDevProduct = 2,
+    UsbDevSerial = 3,
+};