add experimental wasi module support on top of wasm modules

[devsnek]

@lukewagner@linclark@guybedford@tschneidereit@ofrobots

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

[nodejs-github-bot]

Lite-CI: https://ci.nodejs.org/job/node-test-pull-request-lite-pipeline/3612
CI: https://ci.nodejs.org/job/node-test-pull-request/23836/

[devsnek]

i tried to set up the test/wasi directory but the test runner isn't recognizing test/wasi/test.js as a test file @nodejs/testing

[lukewagner]

\o/ \o/ Really excited this is testing and running vanilla clang/wasi-sysroot output.

[addaleax]

🎉

[ofrobots]

Looking great! Thanks for putting this together. I'm experimenting with some 'real world' code that relies on this over at https://github.com/ofrobots/brotli-wasm.

[syrusakbary]

This is awesome! Great work on the PR 👏

[Trott]

i tried to set up the test/wasi directory but the test runner isn't recognizing test/wasi/test.js as a test file @nodejs/testing

Did this get resolved or is it still a problem?

[devsnek]

@Trott still a problem

[cjihrig]

@devsnek, rename test/wasi/test.js to test/wasi/test-wasi.js (or something else that begins with test-) and it should work.

[devsnek]

@cjihrig i attempted to add seeking but the native function keeps returning undefined on success instead of the new offset ;(.

if anyone better with napi sees the bug please let me know