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

firmware/targets/f7/fatfs/spi_sd_hal.c

@@ -1,5 +1,5 @@
 #include "main.h"
-#include <furi-hal.h>
+#include <furi_hal.h>
 #include <furi.h>
 
 #define SD_DUMMY_BYTE 0xFF
@@ -19,7 +19,8 @@ uint8_t SD_IO_WriteByte(uint8_t Data);
  * @retval None
  */
 static void SPIx_WriteReadData(const uint8_t* DataIn, uint8_t* DataOut, uint16_t DataLength) {
-    furi_check(furi_hal_spi_bus_trx(furi_hal_sd_spi_handle, (uint8_t*)DataIn, DataOut, DataLength, SpiTimeout));
+    furi_check(furi_hal_spi_bus_trx(
+        furi_hal_sd_spi_handle, (uint8_t*)DataIn, DataOut, DataLength, SpiTimeout));
 }
 
 /**