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_encoder.h

@@ -0,0 +1,32 @@
+#pragma once
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+    bool prev_bit;
+    uint8_t step;
+} ManchesterEncoderState;
+
+typedef enum {
+    ManchesterEncoderResultShortLow = 0b00,
+    ManchesterEncoderResultLongLow = 0b01,
+    ManchesterEncoderResultLongHigh = 0b10,
+    ManchesterEncoderResultShortHigh = 0b11,
+} ManchesterEncoderResult;
+
+void manchester_encoder_reset(ManchesterEncoderState* state);
+
+bool manchester_encoder_advance(
+    ManchesterEncoderState* state,
+    const bool curr_bit,
+    ManchesterEncoderResult* result);
+
+ManchesterEncoderResult manchester_encoder_finish(ManchesterEncoderState* state);
+
+#ifdef __cplusplus
+}
+#endif