nodebuilder: restructure modules to ensure LN does not build with unnecessary dependencies

[Wondertan]

When you build an LN, it will bring all the dependencies in the build, including those that are only needed for FN/BN. This becomes blocking for an attempt to build the node in WASM/JS. We should think through how we can make the nodebuilder FX modules not contain builds for all node types in a single file/pkg and split them apart.