Refactors

• ♻️ Refactor Library Skills, make info easier to find for agents. PR #15841 by @tiangolo.

Internal

• 👷 Simplify pull request workflow triggers. PR #15836 by @tiangolo.
• 👷 Update issue-manager to 0.7.1. PR #15833 by @tiangolo.
• ⬆️ Update issue-manager to 0.7.0. PR #15831 by @tiangolo.
• 🔧 Update sponsors: Add TestMu again. PR #15830 by @tiangolo.
• 🔒️ Update zizmor workflow security checks. PR #15820 by @tiangolo.
• ⬆ Bump pydantic-settings from 2.14.1 to 2.14.2. PR #15799 by @dependabot[bot].