support svelte.config.ts #1133
Description
Describe the problem
If users opt to create a project with typescript enabled, they still get a svelte.config.js file generated by sv because we load the config via import. Runtimes like deno and bun, and more recently nodejs allow importing local .ts files now, so users expecting this to work get confused, because svelte.config.ts is ignored and default config is used instead.
Describe the proposed solution
detect and try to import svelte.config.ts if it works, then use it. if it fails, tell the user to bring a runtime that supports it or change to svelte.config.js
Alternatives considered
wait longer until it is supported unflagged in node/available in webcontainers (sveltelab, kit tutorial, stackblitz ...)
Importance
would make my life easier