feat: add basic mqtt support #480

Job	Run time
bullseye armv7 / build	1m 40s
bookworm armv7 / build	1m 22s
bookworm armv7 / test (run_install_common.sh)	14m 24s
bookworm armv7 / test (run_install_faststartup.sh)	10m 55s
bookworm armv7 / test (run_install_webapp_local.sh)	19m 58s
bookworm armv7 / test (run_install_webapp_download.sh)	13m 15s
bookworm armv7 / test (run_install_libzmq_local.sh)	25m 45s
bullseye armv7 / test (run_install_common.sh)	13m 45s
bullseye armv7 / test (run_install_faststartup.sh)	9m 34s
bullseye armv7 / test (run_install_webapp_local.sh)	20m 26s
bullseye armv7 / test (run_install_webapp_download.sh)	13m 57s
bullseye armv7 / test (run_install_libzmq_local.sh)	25m 5s
bullseye armv7 / cleanup	2s
bookworm armv7 / cleanup	4s
	2h 50m 12s

Provide feedback