🖉 Update changelog with v0.5.0

Author: devlooped-bot

changelog.md

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+# Changelog
+
+## [v0.5.0](https://github.com/devlooped/Extensions.AI/tree/v0.5.0) (2025-07-01)
+
+[Full Changelog](https://github.com/devlooped/Extensions.AI/compare/21a457cb50d98c69eda4e62bad971e766f2ec2b6...v0.5.0)
+
+:sparkles: Implemented enhancements:
+
+- Add support for .env files [\#47](https://github.com/devlooped/Extensions.AI/pull/47) (@kzu)
+- Simplify and unify implementation of JSON console logging [\#46](https://github.com/devlooped/Extensions.AI/pull/46) (@kzu)
+- Add opinionated lib for \(mostly?\) single-file agents [\#42](https://github.com/devlooped/Extensions.AI/pull/42) (@kzu)
+- Add first-class support for Grok unique features [\#41](https://github.com/devlooped/Extensions.AI/pull/41) (@kzu)
+- Add more intuitive API for creating chat messages [\#38](https://github.com/devlooped/Extensions.AI/pull/38) (@kzu)
+- Add JSON console output rendering [\#37](https://github.com/devlooped/Extensions.AI/pull/37) (@kzu)
+- Add console JSON logging extension [\#12](https://github.com/devlooped/Extensions.AI/pull/12) (@kzu)
+- Initial CLI with basic command for help/sponsoring [\#9](https://github.com/devlooped/Extensions.AI/pull/9) (@kzu)
+- Add tool-based retrieval tool over the responses API [\#1](https://github.com/devlooped/Extensions.AI/pull/1) (@kzu)
+
+
+
+\* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/github-changelog-generator/github-changelog-generator)*