chore(release): prepare v0.2.0

Author: dndungu

CHANGELOG.md

@@ -0,0 +1,20 @@
+# Changelog
+
+## [0.2.0](https://github.com/zerfoo/ztoken/compare/v0.1.0...v0.2.0) (2026-03-16)
+
+### Documentation
+
+* Add CONTRIBUTING.md with development guidelines ([60a1f99](https://github.com/zerfoo/ztoken/commit/60a1f99))
+* Expand README with examples and use cases ([2a44b53](https://github.com/zerfoo/ztoken/commit/2a44b53))
+
+### Chore
+
+* Add GitHub issue templates ([06ba2b9](https://github.com/zerfoo/ztoken/commit/06ba2b9))
+
+## [0.1.0](https://github.com/zerfoo/ztoken/releases/tag/v0.1.0) (2025-12-01)
+
+### Features
+
+* Add BPE tokenizer package ported from zerfoo/pkg/tokenizer
+* Add GGUF tokenizer loader with Metadata interface
+* Add CI workflow, GoReleaser, and release-please config