feat(cli): add searchable template wizard

[ulises-jeremias]

Summary

• Replaces the interactive template text prompt with a searchable questionary.autocomplete flow
• Adds CNA-style category badges, labels, slug, and description text so users can search by framework/category/keyword
• Adds a custom template URL sentinel and follow-up URL prompt
• Keeps extension multiselect and customOptions out of scope for separate issues ([P1] Interactive wizard: category-grouped extension multiselect #163, [P1] Interactive prompts for cpa.config.json customOptions #164)

Closes#162

CNA reference

• packages/create-awesome-node-app/src/options.ts
• packages/create-awesome-node-app/src/templates.ts

Test plan

• uv run ruff check packages/create-awesome-python-app/src/create_awesome_python_app/catalog.py packages/create-awesome-python-app/src/create_awesome_python_app/cli.py packages/create-awesome-python-app/tests/test_catalog_resolve.py
• uv run pytest packages/create-awesome-python-app/tests/test_catalog_resolve.py -q
• uv run pyright packages/create-awesome-python-app/src/create_awesome_python_app/cli.py packages/create-awesome-python-app/src/create_awesome_python_app/catalog.py

Review notes

This PR is stacked on #173 because #162 depends on catalog slug resolution from #160/#161. After #173 merges, this PR should be retargeted to main.

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