chore(release): prepare 0.2.3

[ulises-jeremias]

Summary

• Bump to 0.2.3 — select+filter template picker + high-contrast prompt colors (feat: browsable template select + high-contrast prompt colors #209)

Test plan

• Merge, tag `create-awesome-python-app@0.2.3`
• `uvx --refresh create-awesome-python-app` — browse/filter templates, check contrast

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