v0.3.0

What's Changed

• docs(changelog): flesh out 0.2.0 with full feature history by @lionelfarr in #76
• docs(readme): correct signing notes + explain macOS keychain prompt by @lionelfarr in #77
• feat(onboarding): first-run setup screen when no CLIs are installed by @lionelfarr in #78
• Restrict unsupported Codex models by @owenlfarr in #80
• chore: clean up model-restriction nits by @lionelfarr in #81
• chore(release): 0.3.0 by @lionelfarr in #82

Full Changelog: v0.2.0...v0.3.0