Move readme to md

[HarlemSquirrel]

No description provided.

[Copilot]

🟡 Changes recommended

The gemspec still references the removed README and excludes the replacement from the package.

1 open finding

• Update gemspec references from README.rdoc to README.md · New

What changed in this PR

Converts the project README from RDoc to Markdown.

Changes:

• Replaces README.rdoc with README.md.
• Updates formatting, badges, code blocks, and document links.

File	Description
README.rdoc	Removes the RDoc README.
README.md	Adds the Markdown replacement.

🧠 Review effort: Balanced

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[Copilot]

🔵 Needs a closer look

The new README documents an unsupported Ruby version and a nonexistent Docker Compose service.

0 open findings

1 resolved since last review

• Update gemspec references from README.rdoc to README.md

Previously missed (2)

In code that hasn't changed since last review

README states outdated Ruby 2.0 compatibility

README.md:31

The migrated README still claims Ruby 2.0 compatibility, but the gemspec requires Ruby >= 3.0.0 (and History.rdoc:10 records that requirement). This will mislead users on Ruby 2.x into attempting an installation that RubyGems rejects; update the documented minimum to match the package metadata.

README references nonexistent ci-2.7 service

README.md:74

This command references a service that no longer exists: docker-compose.yml defines ci-3.0 and newer services, not ci-2.7. Following the new README therefore fails immediately with “no such service”; use an available service (and the Compose v2 command used by CI).

🧠 Review effort: Balanced