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/f6/furi_hal/furi_hal_spi_config.h

@@ -0,0 +1,61 @@
+#pragma once
+
+#include <furi_hal_spi_types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Preset for ST25R916 */
+extern const LL_SPI_InitTypeDef furi_hal_spi_preset_2edge_low_8m;
+
+/** Preset for CC1101 */
+extern const LL_SPI_InitTypeDef furi_hal_spi_preset_1edge_low_8m;
+
+/** Preset for ST7567 (Display) */
+extern const LL_SPI_InitTypeDef furi_hal_spi_preset_1edge_low_4m;
+
+/** Preset for SdCard in fast mode */
+extern const LL_SPI_InitTypeDef furi_hal_spi_preset_1edge_low_16m;
+
+/** Preset for SdCard in slow mode */
+extern const LL_SPI_InitTypeDef furi_hal_spi_preset_1edge_low_2m;
+
+/** Furi Hal Spi Bus R (Radio: CC1101, Nfc, External)*/
+extern FuriHalSpiBus furi_hal_spi_bus_r;
+
+/** Furi Hal Spi Bus D (Display, SdCard) */
+extern FuriHalSpiBus furi_hal_spi_bus_d;
+
+/** CC1101 on `furi_hal_spi_bus_r` */
+extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_subghz;
+
+/** ST25R3916 on `furi_hal_spi_bus_r` */
+extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_nfc;
+
+/** External on `furi_hal_spi_bus_r`
+ * Preset: `furi_hal_spi_preset_1edge_low_2m`
+ * 
+ * miso: pa6
+ * mosi: pa7
+ * sck: pb3
+ * cs:  pa4 (software controlled)
+ * 
+ * @warning not initialized by default, call `furi_hal_spi_bus_handle_init` to initialize
+ * Bus pins are floating on inactive state, CS high after initialization
+ * 
+ */
+extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_external;
+
+/** ST7567(Display) on `furi_hal_spi_bus_d` */
+extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_display;
+
+/** SdCard in fast mode on `furi_hal_spi_bus_d` */
+extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast;
+
+/** SdCard in slow mode on `furi_hal_spi_bus_d` */
+extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_slow;
+
+#ifdef __cplusplus
+}
+#endif