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_i2c_config.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <furi_hal_i2c_types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Internal(power) i2c bus, I2C1, under reset when not used */
+extern FuriHalI2cBus furi_hal_i2c_bus_power;
+
+/** External i2c bus, I2C3, under reset when not used */
+extern FuriHalI2cBus furi_hal_i2c_bus_external;
+
+/** Handle for internal(power) i2c bus
+ * Bus: furi_hal_i2c_bus_external
+ * Pins: PA9(SCL) / PA10(SDA), float on release
+ * Params: 400khz
+ */
+extern FuriHalI2cBusHandle furi_hal_i2c_handle_power;
+
+/** Handle for external i2c bus
+ * Bus: furi_hal_i2c_bus_external
+ * Pins: PC0(SCL) / PC1(SDA), float on release
+ * Params: 100khz
+ */
+extern FuriHalI2cBusHandle furi_hal_i2c_handle_external;
+
+#ifdef __cplusplus
+}
+#endif