feat(kmkpy): make dist -> uf2 files for each supported NRF board, with KMK bundled

build_kmkpython_release.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+TIMESTAMP=$(date +%s)
+TARGETS=${TARGETS:-"nice_nano itsybitsy_nrf52840_express"}
+
+for TARGET in ${TARGETS}; do
+	make -C /opt/kmkpython/ports/nrf BOARD="${TARGET}"
+	cp "/opt/kmkpython/ports/nrf/build-${TARGET}/firmware.uf2" "/dist/${TARGET}-${TIMESTAMP}.uf2"
+	echo "===> Built /dist/${TARGET}-${TIMESTAMP}.uf2"
+done