release: bump version to 0.2.0 + CHANGELOG for v0.2.0

[clean6378-max-it]

Closes #132
bump pyproject.toml to 0.2.0 and finalize CHANGELOG for everything merged since v0.1.0 (#133–#138, search/export/perf work).

operator step after merge: annotated tag v0.2.0 on master + GitHub release (no PyPI/npm per sprint convention).

Summary by CodeRabbit

• New Features

  • Added improved search indexing and faster, more reliable search behavior.
  • Added shared export functionality across web and command-line workflows.
  • Added support for raw data access and more consistent workspace displays.

• Bug Fixes

  • Improved handling of workspace paths, invalid workspaces, search errors, and metadata inconsistencies.
  • Fixed edge cases affecting tabs, exports, and workspace information.

• Release

  • Published version 0.2.0 with updated release documentation and comparison links.

[coderabbitai]

📝 Walkthrough

Walkthrough

The project version changes from 0.1.0 to 0.2.0, and CHANGELOG.md adds the 0.2.0 release notes, updates prior entries, and adds comparison links.

Changes

Version 0.2.0 release

Layer / File(s)	Summary
Version and release notes update pyproject.toml, CHANGELOG.md	Package metadata is updated to version 0.2.0, with corresponding release notes, prior-release cleanup, and comparison links.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Suggested reviewers: bradjin8

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the version bump and changelog update for v0.2.0.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/v0.2.0

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