v13

What's Changed

• Use require_relative in gemspec by @shugo in #120
• Setup devcontainer by @shugo in #123
• Add copilot-setup-steps.yml for Copilot coding agent by @shugo in #125
• Revert "Merge pull request #123 from shugo/setup_devcontainer" by @shugo in #126
• Implement apply_on_rectangle method to consolidate rectangle operations by @copilot-swe-agent in #124
• Fix undo for rectangle commands by @shugo in #127
• Fix point in rectangle commands by @shugo in #128
• Add clear_rectangle by @shugo in #131
• Add a Dockerfile for Gemini CLI by @shugo in #132
• Exclude dot files and logo/ by @shugo in #133

Full Changelog: v12...v13