Add Worker Loader

[futursolo]

This pull request implements the loader shim mode that is coming in the next trunk version.

This mode no longer uses inline scripts to load workers.
Trunk is responsible to create a loader script to initialise the worker.

[futursolo]

Trunk v0.17 has been released so we can release this gloo worker mode as well.

[ranile]

Can you please also update the chnagelog?

Also, I would like to keep the ability to build workers without using trunk. That is kept intact, right? I use it to build workers that are called from a JS (SvelteKit) application so that is pretty important to have

[futursolo]

Can you please also update the chnagelog?

This is done.

Also, I would like to keep the ability to build workers without using trunk. That is kept intact, right? I use it to build workers that are called from a JS (SvelteKit) application so that is pretty important to have

This pull request adds a spawn_with_loader() function, which can be used with the loader shim created by trunk when data-loader-shim option is specified in index.html.

Existing worker users can continue using the spawn() function or create the loader shim manually.

e.g: The markdown example create the following loader shim:

importScripts("./example_markdown_worker.js");wasm_bindgen("./example_markdown_worker_bg.wasm");

[ranile]

Thanks!

[ranile]

Wonder if trunk can set a build-time env so this path doesn't need to be hard coded