refactor!: Use RepositoryPermissions struct for User.Permissions

[niveshdandyan]

BREAKING CHANGE: User.Permissions is now *RepositoryPermissions instead of map[string]bool.

Summary

Replace map[string]bool with *RepositoryPermissions struct for the User.Permissions field.

Fixes #3947

Changes

• Changed User.Permissions from map[string]bool to *RepositoryPermissions
• Updated related tests to use the struct format
• Regenerated accessor functions

Rationale

According to the List Collaborators API docs, the permissions object has a fixed, well-defined structure with pull, triage, push, maintain, and admin boolean fields.

Using the existing RepositoryPermissions struct provides:

• Better type safety
• Consistency with Repository.Permissions
• IDE autocompletion for permission fields

Breaking Change

This is a breaking API change as noted in the issue labels. Users who access User.Permissions will need to update their code from map access (u.Permissions["pull"]) to struct access (u.GetPermissions().GetPull()).

Testing

All existing tests pass with the updated types.

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.51%. Comparing base (91d01f7) to head (5d68936).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3963   +/-   ##
=======================================
  Coverage   85.51%   85.51%           
=======================================
  Files         204      204           
  Lines       17554    17554           
=======================================
  Hits        15011    15011           
  Misses       1913     1913           
  Partials      630      630           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[gmlewis]

Thank you, @niveshdandyan!
LGTM.
Awaiting second LGTM+Approval from any other contributor to this repo before merging.

cc: @stevehipwell - @alexandear - @zyfy29 - @Not-Dhananjay-Mishra

[Not-Dhananjay-Mishra]

LGTM

[gmlewis]

Thank you, @Not-Dhananjay-Mishra!
Merging.