Add ReadTheDocs and Code Coverage badges to README

[Copilot]

Adds ReadTheDocs and Code Coverage badges to README following the ezstitcher repository pattern.

Changes

• README.md: Added ReadTheDocs status badge and Code Coverage badge alongside existing badges
• .github/workflows/coverage-pages.yml: New workflow that runs tests with coverage, generates SVG badge via genbadge, commits badge to .github/badges/coverage.svg, and deploys HTML reports to GitHub Pages
• .github/badges/coverage.svg: Placeholder badge (updated automatically by workflow)
• SETUP_INSTRUCTIONS.md: Documents required manual steps

Manual Steps Required

After merge:

1. Enable GitHub Pages: Settings > Pages > Source > "GitHub Actions"
2. Update repo description: Add https://arraybridge.readthedocs.io as website URL

Notes

• Coverage workflow runs independently on push to main; existing CI continues uploading to Codecov
• .readthedocs.yml already configured correctly
• Uses project's dev dependencies for version consistency

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/search/repositories
  • Triggering command: curl -s REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Can you also include code cov and rtd badges in the readme? make sure the rtd workflow is setup with link in repo description too. also setup code cov with badge like with the ezstitcher repo

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