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/irda/irda_runner.cpp

@@ -0,0 +1,9 @@
+#include "irda_app.h"
+
+extern "C" int32_t irda_app(void* p) {
+    IrdaApp* app = new IrdaApp();
+    int32_t result = app->run(p);
+    delete app;
+
+    return result;
+}