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/toolbox/manchester_decoder.h

@@ -0,0 +1,31 @@
+#pragma once
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    ManchesterEventShortLow = 0,
+    ManchesterEventShortHigh = 2,
+    ManchesterEventLongLow = 4,
+    ManchesterEventLongHigh = 6,
+    ManchesterEventReset = 8
+} ManchesterEvent;
+
+typedef enum {
+    ManchesterStateStart1 = 0,
+    ManchesterStateMid1 = 1,
+    ManchesterStateMid0 = 2,
+    ManchesterStateStart0 = 3
+} ManchesterState;
+
+bool manchester_advance(
+    ManchesterState state,
+    ManchesterEvent event,
+    ManchesterState* next_state,
+    bool* data);
+
+#ifdef __cplusplus
+}
+#endif