chore: prepare v2.1.0 release

[helizaga]

Summary by CodeRabbit

• New Features

  • Workspace and file support
  • New flags and configuration improvements
  • New adapters and hooks
  • Enhanced copy functionality
  • Platform install support

• Bug Fixes

  • Completion naming issues
  • Error visibility improvements
  • Messaging clarity
  • Sanitization and symlink handling
  • Multi-value key handling

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Caution

Review failed

The pull request is closed.

Walkthrough

Version number incremented from 2.0.0 to 2.1.0 across the project. Changelog updated with a new 2.1.0 release section documenting feature additions and bug fixes, with the unreleased comparison reference updated accordingly.

Changes

Cohort / File(s)	Summary
Version and Documentation Updates CHANGELOG.md, bin/gtr	Version bumped to 2.1.0; changelog expanded with new release section containing 20+ feature additions (workspace/file support, new flags, config improvements, adapters, hooks, copy enhancements, platform install) and 6 bug fixes (completion naming, error visibility, messaging, sanitization, symlinks, multi-value keys); unreleased comparison reference updated from v2.0.0...HEAD to v2.1.0...HEAD

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A version leap, from two to two-point-one,
With features bright and bugs now fixed as one!
The changelog grows with tales of all we've done,
New workflows bloom—our journey's never done! 🌱✨

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch release/v2.1.0

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📥 Commits

Reviewing files that changed from the base of the PR and between ad0f839 and 5fd1ce4.

📒 Files selected for processing (2)

• CHANGELOG.md
• bin/gtr

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