feat(plugins): add 2 new methods : getAccounts and getIdentities

[paulhenry46]

Summary

Plugins often need context about the active user's environment to customize behavior, pre-fill form fields, or integrate external services with specific email identities. Currently, there is no API for plugins to inspect the user's available accounts or email identities.

These 2 new methods in API plugin enable that.

Changes

• add user.getAccounts with new permission account:read. We don't give all the properties of Account Object, the most sensitive are not given.
• add user.getIdentities with permission identity:read. There is no sensitive values, so we give all properties.

Related issues

Closes #

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactor / code quality improvement
• Chore / dependency update / CI change

Checklist

• I have read the Contributing Guide
• My code follows the project's code style and conventions
• I have run npm run typecheck && npm run lint and there are no errors
• The build passes (npm run build)
• I have tested my changes locally
• I have added or updated documentation if needed
• I have updated translations (locales/) if my changes affect user-facing text
• I have included screenshots or a screen recording for UI changes

Screenshots / demo

Notes for reviewers

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