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/flipper_file/flipper_file_helper.c

@@ -89,7 +89,7 @@ bool flipper_file_seek_to_key(File* file, const char* key, bool strict_mode) {
 
                 found = true;
                 break;
-            } else if (strict_mode) {
+            } else if(strict_mode) {
                 found = false;
                 break;
             }