feat: Allow to enable/disable Cover Art in Web App & load from filesystem #430

Job	Run time
bookworm armv7 / build	1m 20s
bullseye armv7 / build	1m 20s
bookworm armv7 / test (run_install_common.sh)	13m 56s
bookworm armv7 / test (run_install_faststartup.sh)	11m 0s
bookworm armv7 / test (run_install_webapp_local.sh)	21m 54s
bookworm armv7 / test (run_install_webapp_download.sh)	13m 21s
bookworm armv7 / test (run_install_libzmq_local.sh)	24m 54s
bullseye armv7 / test (run_install_common.sh)	14m 19s
bullseye armv7 / test (run_install_faststartup.sh)	10m 22s
bullseye armv7 / test (run_install_webapp_local.sh)	22m 41s
bullseye armv7 / test (run_install_webapp_download.sh)	13m 59s
bullseye armv7 / test (run_install_libzmq_local.sh)	24m 4s
bullseye armv7 / cleanup	5s
bookworm armv7 / cleanup	3s
	2h 53m 18s

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