feature: add sandboxed terminal #1817

Job	Run time
build-lumina-nvidia (41, silverblue, open)	12m 28s
build-lumina (41, silverblue)	14m 42s
build-lumina-nvidia (41, cosmic, open)	10m 37s
build-lumina (41, cosmic)	11m 57s
build-lumina-nvidia (41, kinoite, open)	13m 2s
build-lumina (41, kinoite)	13m 9s
build-lumina-nvidia (stable, silverblue, open)	11m 28s
build-lumina (stable, silverblue)	11m 27s
build-lumina-nvidia (stable, cosmic, open)	10m 4s
build-lumina (stable, cosmic)	11m 2s
build-lumina-nvidia (stable, kinoite, open)	14m 10s
build-lumina (stable, kinoite)	12m 6s
check	3s
	2h 26m 15s

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