feat: browsable template select + high-contrast prompt colors

[ulises-jeremias]

Summary

• Template picker is now `questionary.select` with `use_search_filter=True` — browse the full list with ↑↓ and type to filter (better discovery than autocomplete-only)
• High-contrast `CPA_PROMPT_STYLE` (light blue/green on slate) for select, checkbox, text, and confirm
• Bright bold ANSI category badges again (safe with select; autocomplete HTML parsing was the earlier crash)

Test plan

• `pytest` create-awesome-python-app package
• `uvx --from git+https://github.com/Create-Python-App/create-python-app.git@feat/select-search-contrast create-awesome-python-app` — browse + filter + check contrast
• After release: `uvx --refresh create-awesome-python-app`

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