SDK-223 Honor JSON output for project commands

[Stephen Belanger (Qard)]

Summary

• make projects create and view emit project JSON with --json
• make projects delete emit a deleted-project JSON result with --json
• preserve existing human-readable and browser behaviors otherwise

Validation

• cargo fmt --check
• cargo test projects

[chatgpt-codex-connector]

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-08T11:29:39.113083Z	7eab965	PR opened

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Reviewed commit: 7eab965af7

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