feat: add SOPS secret add/delete with darwin-rebuild verification and commit
SC
1mo ago+1272-232
Summary
Hooks up the original storybook mocks end-to-end for SOP secret add and delete operations. (Age will be forthcoming.)
Includes some fileops and nix editor refactorings and enhancements for reusable/recurring patterns.
Screenshots:
Test Plan
New unit tests as appropriate, plus manual testing e2e.
- No test plan needed
Docs
- Docs updated (companion PR in darkmatter/nixmac-web: #___)
- No docs update needed