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

applications/lfrfid/helpers/rfid_key.h

@@ -0,0 +1,27 @@
+#pragma once
+#include "key_info.h"
+#include <array>
+
+class RfidKey {
+public:
+    RfidKey();
+    ~RfidKey();
+
+    void set_type(LfrfidKeyType type);
+    void set_data(const uint8_t* data, const uint8_t data_size);
+    void set_name(const char* name);
+
+    LfrfidKeyType get_type();
+    const uint8_t* get_data();
+    const char* get_type_text();
+    const uint8_t get_type_data_count();
+    char* get_name();
+    uint8_t get_name_length();
+    void clear();
+    RfidKey& operator=(const RfidKey& rhs);
+
+private:
+    std::array<uint8_t, LFRFID_KEY_SIZE> data;
+    LfrfidKeyType type;
+    char name[LFRFID_KEY_NAME_SIZE + 1];
+};