Extract GitHub org config into dedicated repo

Objective

Move the github/ directory (declarative repo settings and sync tooling) out of osapi into a dedicated osapi-io/.github or osapi-io/github-config repo.

Context

The github/ directory currently lives untracked in the main osapi repo. It contains:

• repos.json — declarative GitHub org config (repo settings, branch protection rules)
• sync.sh — Bash script that uses gh CLI to detect drift and apply config

This tooling manages org-wide settings across all osapi-io repos, so it doesn't belong inside a single project repo.

Research

Look into existing tools for declarative GitHub org/repo management:

• Terraform GitHub provider
• github-mgmt — GitOps for GitHub org settings
• Probot settings — .github/settings.yml applied via GitHub App
• safe-settings — GitHub's own org-level settings management

Evaluate whether an off-the-shelf solution fits before building custom tooling.

Notes

• The current sync.sh script is functional but minimal
• Branch protection and repo settings are already configured via GitHub UI / API — the script checks for drift
• A dedicated repo would allow CI to run the sync on a schedule or on push