.ts file support

[bcomnes]

If its not too annoying, maybe consider adding .ts file support. esbuild supports it.

• Look for .ts files (precedence goes to .ts because someone might build out into the same directory in weird cases) but .js is still the golden path.
• Import / direct run with https://github.com/tapjs/tapjs/tree/main/src/typescript or https://github.com/TypeStrong/ts-node
• Lazy load ts-node only if a .ts file is found.

Questions:

• Does loading a loader in the main thread carry over to workers?
• Do we need to load the loader into every worker?

[bcomnes]

Reprioritizing this now that node has type stripping.

[bcomnes]

This is done.