Fix composer.json: concise description, update email to info@netresea…

…rch.de

Add standardized installation, composer.json, release workflow

- Add composer.json for PHP distribution via netresearch/agent-github-project
- Add GitHub Actions release workflow for packaging
- Minor SKILL.md formatting improvements

fix: Symlink README.md to SKILL.md for GitHub repo frontmatter

Merge pull request #1 from netresearch/feat/merge-queue-patterns

feat: Add merge queue patterns and auto-merge improvements