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/f6/target.mk

@@ -92,7 +92,7 @@ C_SOURCES += \
 
 # BLE glue 
 CFLAGS += \
-	-I$(TARGET_DIR)/ble-glue \
+	-I$(TARGET_DIR)/ble_glue \
 	-I$(CUBE_DIR)/Middlewares/ST/STM32_WPAN \
 	-I$(CUBE_DIR)/Middlewares/ST/STM32_WPAN/ble \
 	-I$(CUBE_DIR)/Middlewares/ST/STM32_WPAN/ble/core \
@@ -102,7 +102,7 @@ CFLAGS += \
 	-I$(CUBE_DIR)/Middlewares/ST/STM32_WPAN/interface/patterns/ble_thread/tl \
 	-I$(CUBE_DIR)/Middlewares/ST/STM32_WPAN/interface/patterns/ble_thread/shci
 C_SOURCES += \
-	$(wildcard $(TARGET_DIR)/ble-glue/*.c) \
+	$(wildcard $(TARGET_DIR)/ble_glue/*.c) \
 	$(CUBE_DIR)/Middlewares/ST/STM32_WPAN/utilities/otp.c \
 	$(CUBE_DIR)/Middlewares/ST/STM32_WPAN/utilities/stm_list.c \
 	$(CUBE_DIR)/Middlewares/ST/STM32_WPAN/utilities/dbg_trace.c \
@@ -144,7 +144,7 @@ ifeq ($(INVERT_RFID_IN), 1)
 CFLAGS += -DINVERT_RFID_IN
 endif
 
-FURI_HAL_DIR = $(TARGET_DIR)/furi-hal
+FURI_HAL_DIR = $(TARGET_DIR)/furi_hal
 CFLAGS += -I$(FURI_HAL_DIR)
 C_SOURCES += $(wildcard $(FURI_HAL_DIR)/*.c)