Publish an alternative Wasm binary with debug symbols enabled

[tomaka]

It is right now not really possible to profile smoldot in real-world apps because the smoldot Wasm published on NPM has debug info stripped.
Putting the debug info in the Wasm adds around 2MiB to its size, which is unacceptable.

Ideally, the debug info would be in a source map loaded separately. In practice, this is not possible at the moment.
cc #83
We could look at tools that convert DWARF to source maps, but it seems tedious.

Instead, let's ship a second Wasm binary in the smoldot package, and add a new entry point that makes it possible for end users to load that other binary.