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_info.h

@@ -0,0 +1,34 @@
+/**
+ * @file furi_hal_info.h
+ * Device info HAL API
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Callback type called every time another key-value pair of device information is ready
+ *
+ * @param      key[in]      device information type identifier
+ * @param      value[in]    device information value
+ * @param      last[in]     whether the passed key-value pair is the last one
+ * @param      context[in]  to pass to callback
+ */
+typedef void (
+    *FuriHalInfoValueCallback)(const char* key, const char* value, bool last, void* context);
+
+/** Get device information
+ *
+ * @param[in]  callback     callback to provide with new data
+ * @param[in]  context      context to pass to callback
+ */
+void furi_hal_info_get(FuriHalInfoValueCallback callback, void* context);
+
+#ifdef __cplusplus
+}
+#endif