[devkit/cli-v2] Add --dry-run flag to repair and export subcommands

[Tinna23]

Show what would be changed without writing any files.

Files to touch:

• packages/devkit/src/cli/mod.rs
• packages/devkit/src/data_quality/repair.rs

[oscar24357]

@oscar24357 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello maintainer, I would love to work on this issue, can you please assign me to it?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @oscar24357 to this issue.

[Fahmedo]

@Fahmedo has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

hello there i would love to take on this issue

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[drips-wave]

Congratulations, @Fahmedo! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @Fahmedo: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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[Fahmedo]

Resolved in PR #419. Added --dry-run to repair and export subcommands.