Convention and tools for library authors exporting wasm modules

[pi0]

Currently, the npm state is chaotic as each maintainer decided and went with a different path of how exporting (or internally using) wasm modules.

The idea is to provide docs + probably basic CLI tools to make it a little more standard/predictable and optimizable (for example in a way that we don't double bundle WASM files once inlined and once externalized)

More of compatibility with those packages that stick with legacy APIs, can be covered with Runtime Utils (#4)