move embedded tutorials out of protocol tree

tutorials/esp32/uart-bridge/Makefile

@@ -0,0 +1,32 @@
+CWD = $(realpath $(CURDIR))
+MNT = $(realpath $(CURDIR)/../../../..)
+PORT ?= /dev/ttyUSB0
+CMD ?= build
+
+all: example
+
+example:
+	true
+
+build: Makefile $(wildcard main/*)
+	docker run --rm $(DA) -v $(MNT):$(MNT) -w $(CWD) espressif/idf idf.py $(CMD)
+
+flash:
+flash: CMD = flash
+flash: DA = --device $(PORT)
+flash: build
+
+.PHONY: build
+
+bridge.hex: build
+	esputil mkhex \
+		0x8000 build/partition_table/partition-table.bin \
+		0x1000 build/bootloader/bootloader.bin \
+		0x100000 build/mongoose-esp32-example.bin > $@
+
+flash2: bridge.hex
+	esputil -p $(PORT) -b 921600 -fp 0x220 flash bridge.hex
+	esputil -p $(PORT) monitor
+
+clean:
+	rm -rf build