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/ble_glue/dev_info_service.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define DEV_INFO_MANUFACTURER_NAME "Flipper Devices Inc."
+#define DEV_INFO_SERIAL_NUMBER "1.0"
+#define DEV_INFO_FIRMWARE_REVISION_NUMBER TARGET
+#define DEV_INFO_SOFTWARE_REVISION_NUMBER \
+    GIT_COMMIT " " GIT_BRANCH " " GIT_BRANCH_NUM " " BUILD_DATE
+
+void dev_info_svc_start();
+
+void dev_info_svc_stop();
+
+bool dev_info_svc_is_started();
+
+#ifdef __cplusplus
+}
+#endif