Opt-in to use sucrase instead of babel

[rdmurphy]

It would replace the need to pass in a minimum Node version but I could totally see scenarios where you're fine with that and just want the brute-force speed of sucrase. typebundle itself could definitely use it.

Would probably just be a --sucrase flag that disables all babel features and activates @rollup/plugin-sucrase instead to do type-stripping.

[rdmurphy]

sucrase doesn't support the latest TypeScript features yet like type imports unfortunately, making this a no-go for now.

[rdmurphy]

Thought about this more and I'm actually fine to let Babel continue being the primary type-stripper. Now that it's possible to skip @babel/preset-env I think this is less of an issue. I trust that @babel/preset-typescript will be more current than the alternatives, and I have nothing that's slow enough to drag sucrase or esbuild into it.