Make $ deno doc --html read/resolve .js imports from .ts files if .js files dont exist

[izelnakri]

Currently I have one npm package where I declare .ts internal file imports as .js due to a sad compatibility benefit I get here: https://github.com/izelnakri/memoria/blob/main/packages/%40memoria/model/src/index.ts#L1

When I compile this project with tsc tsc can resolve and compile dependencies to a .js project distribution when project path is given. However I miss this feature currently given how new $ deno doc --html is, I think the command should resolve the .js files from .ts if .js doesnt exist because it seems this is what typescript team suggests and kind of implements internally.

Steps to reproduce

This should pass:

deno doc --html --name="@memoria/model" ./index.js