spacetime dev - Replace template selection with fuzzy-filterable menu

[clockwork-labs-bot]

The old template selection in spacetime dev / spacetime init had a two-step flow:

1. Select from a short highlights list (just React)
2. If "Use Template" → dump a flat list and type an ID or GitHub URL

The user couldn't filter or navigate the full template list interactively.

Now: A single FuzzySelect showing all templates with their ID and description. The user can:

• Type to fuzzy-filter by template ID or description (e.g. typing "react" matches react-ts, chat-react-ts, etc.)
• Arrow keys to navigate the filtered list
• Enter to select

Special options at the bottom:

• Clone from GitHub (owner/repo or git URL) — prompts for a repo input
• None (server only) — prompts for server language only

Default selection is the first highlighted template (react-ts).

Net -24 lines (31 added, 55 removed).

[bfops]

Works great for me!

Would you like to initialize a new project? yes
✔ Project name · zeke-test
✔ Project path · ./zeke-test
✔ Database name · zeke-test
? Select a template (type to filter, arrows to navigate) › rust 
❯ basic-rs - A basic Rust client and server template with only stubs for code
  chat-console-rs - Rust server/client implementing quickstart chat
  nextjs-ts - Next.js App Router with TypeScript server
  tanstack-ts - TanStack Start (React + TanStack Query/Router) with TypeScript server
  chat-console-cs - C# server/client implementing quickstart chat
  chat-react-ts - TypeScript server/client implementing quickstart chat
  angular-ts - Angular web app with TypeScript server

if I type something that doesn't match, <Enter> does nothing.

I didn't test the github repo variant but code looks reasonable to me (and didn't change any of the details of parsing the url or anything).

dismissing my review because I'm waiting for another approval and I don't want the bot merging this prematurely

[jdetter]

Tested working, thank you @bfops !

[cloutiertyler]

This is the only one that I would change (or at least would like the chance to discuss first).

The idea with the old setup was that we'd have a more beginner friendly "pick your framework" selection, and then only if you opted to use a template would you be presented with the list of more complex template names. I think we should preserve the two step process, but I think probably both should be fuzzy selectors.