Extracted out of https://github.com/denoland/deno/pull/27838/files
Reduces some allocations by accepting either a pathbuf or url for the
referrer for resolution and returning either a pathbuf or url at the
end, which the caller can then convert into to their preferred state.
This is about 4% faster when still converting the final result to a url
and 6% faster when keeping the result as a path in a benchmark I ran.
This is achieved by storing CJS export analysis ahead of time in the
executable, which should also improve the performance of `denort` by
this never being done anymore (I'm too lazy atm to bench this, but it
will be significant for some programs).
This resurrects the `--unstable-detect-cjs` flag (which became stable),
and repurposes it to attempt loading .js/.jsx/.ts/.tsx files as CJS in
the following additional scenarios:
1. There is no package.json
1. There is a package.json without a "type" field
Also cleans up the implementation of this in the LSP a lot by hanging
`resolution_mode()` off `Document` (didn't think about doing that until
now).
Ensures a dynamic import in a CJS file will consider the referrer as an import for node resolution.
Also adds fixes (adds) support for `"resolution-mode"` in TypeScript.
