v2.11.1

What's Changed

• Use preinstalled ShellCheck in CI by @helizaga in #194
• docs: add maintainers section to README by @helizaga in #195
• fix: make GTR_DEBUG actually report the failing location by @helizaga in #199
• docs: refresh agent guides, README flags, and troubleshooting for v2.11 by @helizaga in #197
• docs: rewrite Copilot instructions and align contributor guides with the current layout by @helizaga in #198

Full Changelog: v2.11.0...v2.11.1