fix(cli): tidy init help and test isolation

[ss-o]

Summary

• remove the misleading --version entry from zunit init --help
• make the missing-config CLI regression test self-contained by stubbing its required commands locally
• align yamllint comment spacing with Prettier output so the current Trunk gate stays green after the release workflow landed

Why

PR #2 surfaced a few useful review notes after its substantive work had already been superseded by PR #1. Two still apply on current main: init --help advertises a global flag as if it were init-specific, and one CLI test relies on ambient host dependencies.

While rebasing onto current main, Trunk also exposed a formatter/linter config mismatch introduced by the newer release workflow: Prettier emits one space before an inline YAML comment, while yamllint's default expected two. The config now accepts Prettier's output instead of forcing a formatter conflict.

Verification

• PATH="$tmpbin:$PATH" ./zunit --tap tests/cli.zunit tests/reports.zunit → 10/10 passing
• PATH="$tmpbin:$PATH" ./zunit --tap tests → 112/112 passing
• zsh -n src/commands/init.zsh tests/cli.zunit
• trunk check --all --no-fix --no-progress → ✔ No issues
• YAML parse for .trunk/configs/.yamllint.yaml and .github/workflows/release.yml
• git diff --check

[Copilot]

Pull request overview

Small follow-up cleanup addressing review notes from PR #2 that still apply on main, plus a yamllint/Prettier reconciliation needed after the release workflow landed.

Changes:

• Remove the spurious --version entry from zunit init --help output and assert its absence in the help test.
• Make the missing-config CLI test self-contained by stubbing revolver and color and pinning PATH instead of relying on host binaries.
• Relax yamllint's comments.min-spaces-from-content to 1 to match Prettier's output.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/commands/init.zsh	Drops the misleading -v, --version line from the init usage text.
tests/cli.zunit	Stubs revolver/color and overrides PATH for the no-config test; adds negative assertion for --version in init help.
.trunk/configs/.yamllint.yaml	Adds comments.min-spaces-from-content: 1 to align with Prettier formatting.

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