do not offer JS if v2 selected

[samualtnorman]

this is a stopgap for #73

[ryansolid]

Thanks for the stopgap @samualtnorman! Following up: the underlying issue #73 no longer reproduces on current main — the TS→JS conversion path was rewritten in #82 (sucrase-based), and JS output for the v2 templates now works end to end. I scaffolded the with-tailwindcss v2 template with JavaScript and vite dev boots and serves SSR HTML with no entry-server.tsx resolution error (details in #73 (comment), where I've closed the issue as fixed).

So suppressing the "Use Typescript?" prompt for v2 is no longer needed — JS is a valid choice for those templates again. Recommend closing this PR; leaving that to you since it's your branch. Thanks again for stepping in with the workaround while this was broken!