chore: prepare v2.2.0 release

[helizaga]

Bump version and update CHANGELOG for v2.2.0 release.

Changes

• bin/gtr: version bump 2.1.0 → 2.2.0
• CHANGELOG.md: new [2.2.0] section with 8 Added + 4 Fixed entries, updated comparison links

Summary by CodeRabbit

• Documentation

  • Updated changelog with version 2.2.0 release information and reorganized release notes.

• Chores

  • Bumped version number to 2.2.0.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Version bump from 2.1.0 to 2.2.0 across the project. CHANGELOG.md is updated with a new dated release block (2026-02-10), reclassifying items between sections and updating navigation links. The version constant in bin/gtr is incremented to match.

Changes

Cohort / File(s)	Summary
Version Bump bin/gtr	GTR_VERSION constant incremented from 2.1.0 to 2.2.0.
Changelog Release Block CHANGELOG.md	New 2.2.0 release entry added with timestamp (2026-02-10), replacing Unreleased section. Items reclassified between Added/Fixed/Removed categories. Unreleased reference updated to v2.2.0...HEAD and version link added.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A version hops forth, now 2.2.0 so fine,
Changelog entries aligned, a release divine,
From Unreleased to dated, the path is now clear,
With links and updates—version bump cheer! ✨

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch release/v2.2.0

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