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

docker/Dockerfile

@@ -33,8 +33,8 @@ RUN wget --progress=dot:giga "https://developer.arm.com/-/media/Files/downloads/
 RUN git clone --depth 1 --branch v0.4.1 https://github.com/atomicobject/heatshrink.git && \
     cd heatshrink && make && mv ./heatshrink /usr/local/bin/heatshrink
 
-COPY entrypoint.sh syntax_check.sh /
+RUN ln -s `which clang-format-12` /usr/local/bin/clang-format
 
-RUN chmod +x /syntax_check.sh
+COPY entrypoint.sh /
 
 ENTRYPOINT ["/entrypoint.sh"]