Extract files from disc image to `object_base` by default #257

Job	Run time
Check	22s
Format	12s
Deny (advisories)	20s
Build dtk (ubuntu-latest, x86_64-unknown-linux-musl, linux-x86_64, zigbuild)	1m 53s
Deny (bans licenses sources)	22s
Test (ubuntu-latest)	42s
Build dtk (ubuntu-latest, i686-unknown-linux-musl, linux-i686, zigbuild)	1m 55s
Test (windows-latest)	1m 43s
Build dtk (ubuntu-latest, aarch64-unknown-linux-musl, linux-aarch64, zigbuild)	2m 10s
Test (macos-latest)	23s
Build dtk (windows-latest, i686-pc-windows-msvc, windows-x86, build)	5m 58s
Build dtk (windows-latest, x86_64-pc-windows-msvc, windows-x86_64, build)	4m 11s
Build dtk (windows-latest, aarch64-pc-windows-msvc, windows-arm64, build)	4m 34s
Build dtk (macos-latest, x86_64-apple-darwin, macos-x86_64, build)	1m 28s
Build dtk (macos-latest, aarch64-apple-darwin, macos-arm64, build)	1m 21s
Release	0s
	27m 34s

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