feat: Allow to enable/disable Cover Art in Web App & load from filesystem #426

Job	Run time
bookworm armv7 / build	1m 26s
bullseye armv7 / build	1m 24s
bullseye armv7 / test (run_install_common.sh)	13m 28s
bullseye armv7 / test (run_install_faststartup.sh)	9m 48s
bullseye armv7 / test (run_install_webapp_local.sh)	22m 20s
bullseye armv7 / test (run_install_webapp_download.sh)	13m 53s
bullseye armv7 / test (run_install_libzmq_local.sh)	24m 28s
bookworm armv7 / test (run_install_common.sh)	13m 50s
bookworm armv7 / test (run_install_faststartup.sh)	10m 5s
bookworm armv7 / test (run_install_webapp_local.sh)	20m 58s
bookworm armv7 / test (run_install_webapp_download.sh)	13m 58s
bookworm armv7 / test (run_install_libzmq_local.sh)	24m 39s
bullseye armv7 / cleanup	4s
bookworm armv7 / cleanup	5s
	2h 50m 26s

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