Feature/subcommand key recovery

[frederic-hoerni]

This modification adds the recovery-key sub-command to nullboot for managing (creating, listing, deleting) recovery keys.

It keeps compatibility with the previous command line syntax where no sub-command was defined, and for that adds a default sub-command install, for better documentation and maybe transitioning to it in the future.

[coveralls]

Coverage Report for CI Build 26085281643

Coverage decreased (-7.0%) to 63.776%

Details

• Coverage decreased (-7.0%) from the base build.
• Patch coverage: 155 uncovered changes across 4 files (41 of 196 lines covered, 20.92%).
• 4 coverage regressions across 1 file.

Uncovered Changes

File	Changed	Covered	%
cmd/nullbootctl/main.go	60	0	0.0%
luks2/luks2.go	46	0	0.0%
efibootmgr/reseal.go	81	40	49.38%
efibootmgr/efivars.go	9	1	11.11%

Coverage Regressions

4 previously-covered lines in 1 file lost coverage.

File	Lines Losing Coverage	Coverage
efibootmgr/efivars.go	4	80.0%

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Coverage Stats

Relevant Lines:	1430
Covered Lines:	912
Line Coverage:	63.78%
Coverage Strength:	1.46 hits per line

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💛 - Coveralls