feat: Allow to enable/disable Cover Art in Web App & load from filesystem #427

Job	Run time
bookworm armv7 / build	1m 35s
bullseye armv7 / build	1m 22s
bullseye armv7 / test (run_install_common.sh)	13m 30s
bullseye armv7 / test (run_install_faststartup.sh)	9m 46s
bullseye armv7 / test (run_install_webapp_local.sh)	22m 16s
bullseye armv7 / test (run_install_webapp_download.sh)	14m 1s
bullseye armv7 / test (run_install_libzmq_local.sh)	23m 18s
bookworm armv7 / test (run_install_common.sh)	14m 19s
bookworm armv7 / test (run_install_faststartup.sh)	10m 56s
bookworm armv7 / test (run_install_webapp_local.sh)	21m 12s
bookworm armv7 / test (run_install_webapp_download.sh)	15m 44s
bookworm armv7 / test (run_install_libzmq_local.sh)	28m 17s
bullseye armv7 / cleanup	4s
bookworm armv7 / cleanup	5s
	2h 56m 25s

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