feat(commands): Add `mount` command #494

Job	Run time
Rustfmt	6s
Clippy (default)	49s
Build docs (stable, macos-latest)	55s
Test (stable, default, macos-latest)	1m 46s
Build docs (stable, ubuntu-latest)	14s
Test (stable, default, ubuntu-latest)	1m 28s
Build docs (stable, windows-latest)	1m 54s
Test (stable, default, windows-latest)	1m 38s
Result (CI)	0s
	8m 50s

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