.ts files don't get vendored

[jespertheend]

When a user vendors mod.js most of the required files are vendored. But files such as src/math/types.ts don't.
This is not an issue when you want to run code from Renda in the browser, but types such as Vec3ParameterSingle become any.

An workaround for users could be to vendor including type imports, but this will also result in a lot of studio types getting vendored.

Ideally the core of Renda shouldn't contain any .ts files. The few files that are currently there shouldn't be too difficult to convert to JSDoc.
Type files inside the /studio/ directory can remain there, as they likely won't need to be vendored anyway.