Separate installation of node and ZAP into a standalone part

[MonicaisHer]

The following script could be moved to a new part called nodjs-zap:

matter-pi-gpio-commander/snap/snapcraft.yaml

Lines 82 to 110 in d39721b

	# Install NodeJS and ZAP tool for arm builds
	if [[ $SNAP_ARCH == "arm64" ]]; then
	set -x
	mkdir node_js
	cd node_js
	wget https://nodejs.org/dist/v12.22.12/node-v12.22.12-linux-x64.tar.xz
	tar xfvJ node-v12.22.12-linux-x64.tar.xz
	cp -rn node-v12.22.12-linux-x64/. /opt/node-v12.22.12-linux-x64/
	rm -r node-v12.22.12-linux-x64
	rm -rf /opt/node
	rm -rf /usr/bin/node
	rm -rf /usr/bin/npm
	rm -rf /usr/bin/npx
	ln -s /opt/node-v12.22.12-linux-x64 /opt/node
	ln -s /opt/node/bin/* /usr/bin
	cd ..
	rm -rf node_js
	ZAP_VERSION=v2023.05.22-nightly
	mkdir -p /opt/zap-${ZAP_VERSION}
	git clone https://github.com/project-chip/zap.git /opt/zap-${ZAP_VERSION}
	cd /opt/zap-${ZAP_VERSION}
	git checkout -b ${ZAP_VERSION}
	npm cache clean --force
	npm install -g npm@latest
	npm ci
	export ZAP_DEVELOPMENT_PATH=/opt/zap-${ZAP_VERSION}
	fi