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

bootloader/targets/f7/furi_hal/furi_hal.c

@@ -0,0 +1,21 @@
+#include <furi_hal.h>
+#include <stm32wbxx_ll_utils.h>
+
+void furi_hal_init() {
+    furi_hal_i2c_init();
+    furi_hal_light_init();
+    furi_hal_spi_init();
+    furi_hal_version_init();
+}
+
+void delay(float milliseconds) {
+    LL_mDelay((uint32_t)milliseconds);
+}
+
+void delay_us(float microseconds) {
+    microseconds = microseconds / 1000;
+    if(microseconds < 1) {
+        microseconds = 1;
+    }
+    LL_mDelay((uint32_t)microseconds);
+}