build: add sections to makefile

Makefile

@@ -11,8 +11,12 @@ TREZORHAL_PORT_OPTS=FROZEN_MPY_DIR=src
 UNIX_PORT_OPTS=MICROPY_FORCE_32BIT=1 MICROPY_PY_BTREE=0 MICROPY_PY_TERMIOS=0 MICROPY_PY_FFI=0 MICROPY_PY_USSL=0 MICROPY_SSL_AXTLS=0 DEBUG=1
 CROSS_PORT_OPTS=MICROPY_FORCE_32BIT=1
 
+## help commands:
+
 help: ## show this help
-	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {printf "\033[36mmake %-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
+	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {printf "\033[36m  make %-20s\033[0m %s\n", $$1, $$2} /^##(.*)/ {printf "\033[33m%s\n", substr($$0, 4)}' $(MAKEFILE_LIST)
+
+## dependencies commands:
 
 vendor: ## update git submodules
 	# git submodule update --init
@@ -20,18 +24,24 @@ vendor: ## update git submodules
 res: ## update resources
 	./tools/res_collect
 
+## emulator commands:
+
 run: ## run unix port
 	cd src ; ../vendor/micropython/unix/micropython
 
 emu: ## run emulator
 	./emu.sh
 
+## test commands:
+
 test: ## run unit tests
 	cd tests ; ./run_tests.sh
 
 testpy: ## run selected unit tests from python-trezor
 	cd tests ; ./run_tests_python_trezor.sh
 
+## build commands:
+
 build: build_firmware build_bootloader build_loader build_unix build_cross ## build all
 
 build_firmware: vendor res build_cross ## build firmware with frozen modules
@@ -52,6 +62,8 @@ build_unix: vendor ## build unix port
 build_cross: vendor ## build mpy-cross port
 	$(MAKE) -C vendor/micropython/mpy-cross $(CROSS_PORT_OPTS)
 
+## clean commands:
+
 clean: clean_firmware clean_bootloader clean_loader clean_unix clean_cross ## clean all
 
 clean_firmware: ## clean firmware build
@@ -71,6 +83,8 @@ clean_unix: ## clean unix build
 clean_cross: ## clean mpy-cross build
 	$(MAKE) -C vendor/micropython/mpy-cross clean $(CROSS_PORT_OPTS)
 
+## flash commands:
+
 flash_firmware: ## flash firmware using st-flash
 	st-flash write $(FIRMWARE_BUILD_DIR)/firmware.bin 0x8000000
 
@@ -80,6 +94,8 @@ flash_bootloader: ## flash bootloader using st-flash
 flash_loader: ## flash loader using st-flash
 	st-flash write $(LOADER_BUILD_DIR)/loader.bin 0x8000000
 
+## openocd debug commands:
+
 openocd: ## start openocd which connects to the device
 	openocd -f interface/stlink-v2.cfg -f target/stm32f4x.cfg