Support non-web wasm targets

[WorldSEnder]

Currently, the emitted link module is either an ECMAScript module, or a webpack compatible "bundle".

In case of ECMAScript:

• It uses import to discover the wrapper for the main module
• It uses export to expose the loader functions.
• It uses import.meta.url to resolve the wasm sources.

In case of bundle:

• It imports the wasm file directly to get the exports from the main file
• It uses export to expose the loader functions
• It uses import.source(<module path>) to load, then new WebAssembly.Instance(module) to instantiate

More and other targets like deno, bun, node etc could be added.