fix: un-awaited prompt when creating edge function from template

[cubeghost]

Summary

Fixes CT-1060

When creating an edge function from a template, we weren't awaiting the step where we prompted the user for the route to register the edge function on, leading to the prompt being interrupted by the "Function created!" success message as the rest of scaffoldFromTemplate executed. This sometimes appeared as the CLI hanging, since the prompt for user input was no longer on the last line, making it easy to overlook that the CLI was waiting for user input.

Unfortunately, difficult to test for this without reworking the handleQuestions test helper, which seems daunting right now 😬

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📊 Benchmark results

Comparing with e87635e

• Dependency count: 1,364 (no change)
• Package size: 313 MB ⬇️ 0.00% decrease vs. e87635e
• Number of ts-expect-error directives: 999 (no change)