PR / llm updates

[wallstop]

Description

Minor updates to github actions and llm context around handling github actions.

Related Issue

Fixes #

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 change that neither fixes a bug nor adds a feature)

Checklist

• I have added tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have updated the CHANGELOG
• My changes do not introduce breaking changes, or breaking changes are documented

[Copilot]

Pull request overview

This PR adds comprehensive documentation for GitHub workflow permissions and updates the dotnet tools update workflow with improved PR creation handling and job summaries.

Changes:

• Adds new skill documentation for GitHub workflow permissions, covering repository settings, debugging, and PR creation patterns
• Updates the context index to reference the new skill
• Enhances the update-dotnet-tools workflow with explicit base branch, branch cleanup, output capture, and improved job summaries

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
.llm/skills/github-workflow-permissions.md	New comprehensive skill guide covering workflow permissions, PR automation, debugging patterns, and best practices
.llm/context.md	Adds reference to the new github-workflow-permissions skill in the Feature Skills section
.github/workflows/update-dotnet-tools.yml	Updates actions/checkout version, adds explicit base branch and delete-branch options, adds PR output capture and job summaries