fix(auth): expose Gmail settings scope

[Lubrsy706]

Summary

• add https://www.googleapis.com/auth/gmail.settings.basic to the --full auth scope set
• expose it in the manual scope picker as "Gmail Settings"
• keep it out of default/minimal scopes so first-run login stays conservative
• only filter it as redundant when https://mail.google.com/ is also present; gmail.modify is intentionally not treated as a broader substitute
• add a patch changeset and regression coverage

This refreshes #794 with the conservative scope design kept explicit. Gmail settings endpoints such as filters.list require gmail.settings.basic: https://developers.google.com/workspace/gmail/api/reference/rest/v1/users.settings.filters/list

Testing

• cargo test -p google-workspace-cli settings_basic
• cargo test -p google-workspace-cli resolve_scopes
• git diff --cached --check

[changeset-bot]

🦋 Changeset detected

Latest commit: 3ea3270

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@googleworkspace/cli	Patch

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the Google Workspace CLI by exposing the 'gmail.settings.basic' scope, which is required for accessing specific Gmail settings endpoints like filters. The changes ensure this scope is available for advanced users while maintaining a conservative default for first-time logins. The implementation includes updated scope resolution logic and regression tests to ensure correct behavior during authentication flows.

Highlights

• Scope Expansion: Added the 'gmail.settings.basic' scope to the full authentication set and exposed it in the manual scope picker as 'Gmail Settings'.
• Redundancy Logic: Updated the scope filtering logic to treat 'gmail.settings.basic' as redundant only when the broader 'mail.google.com' scope is present.
• Regression Testing: Added comprehensive unit tests to verify scope resolution, default exclusion, and redundancy filtering behavior.

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[gemini-code-assist]

Code Review

This pull request introduces the https://www.googleapis.com/auth/gmail.settings.basic scope to the Google Workspace CLI. The changes include adding the scope to the full authentication flow, defining it as redundant when the broader https://mail.google.com/ scope is present, and providing a corresponding label for the UI. Additionally, unit tests were added to ensure the scope is correctly handled during scope resolution and filtering. I have no feedback to provide as there were no review comments to evaluate.