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/view/irda_app_brut_view.h

@@ -0,0 +1,18 @@
+#pragma once
+#include <gui/view.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct IrdaAppPopupBrut IrdaAppPopupBrut;
+
+bool popup_brut_increase_progress(IrdaAppPopupBrut* popup_brut);
+IrdaAppPopupBrut* popup_brut_alloc();
+void popup_brut_free(IrdaAppPopupBrut* popup_brut);
+void popup_brut_draw_callback(Canvas* canvas, void* model);
+void popup_brut_set_progress_max(IrdaAppPopupBrut* popup_brut, uint16_t progress_max);
+
+#ifdef __cplusplus
+}
+#endif