[devkit/cli-v2] Add --quiet flag to all subcommands

[Tinna23]

Suppress all output except errors and final result. Useful for scripting.

Files to touch:

• packages/devkit/src/cli/mod.rs — add global --quiet flag to clap config
• All subcommand handlers — check quiet flag before printing

[pchieneye]

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Hello, I have reviewed the issue and understand what needs to be done.

I would appreciate being assigned to it.

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[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?

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[coderolisa]

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

Hello maintainer let me work on this
please assign

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

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[Fahmedo]

Resolved in PR #419. Added --quiet global flag.