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

lib/app-scened-template/record_controller.hpp

@@ -0,0 +1,46 @@
+#pragma once
+#include <furi/record.h>
+
+/**
+ * @brief Class for opening, casting, holding and closing records
+ * 
+ * @tparam TRecordClass record class
+ */
+template <typename TRecordClass> class RecordController {
+public:
+    /**
+     * @brief Construct a new Record Controller object for record with record name
+     * 
+     * @param record_name record name
+     */
+    RecordController(const char* record_name) {
+        name = record_name;
+        value = static_cast<TRecordClass*>(furi_record_open(name));
+    };
+
+    ~RecordController() {
+        furi_record_close(name);
+    }
+
+    /**
+     * @brief Record getter
+     * 
+     * @return TRecordClass* record value
+     */
+    TRecordClass* get() {
+        return value;
+    }
+
+    /**
+     * @brief Record getter (by cast)
+     * 
+     * @return TRecordClass* record value
+     */
+    operator TRecordClass*() const {
+        return value;
+    }
+
+private:
+    const char* name;
+    TRecordClass* value;
+};