Publish a npm `buffrs` package / integration

[mara-schulke]

While prototyping the javascript / typescript integration we discovered, that the existing build tooling can do sufficient task scheduling (e.g. it can invoke a code generator for protocol buffers after installing them). What we discovered is that a) the installation of Buffrs and b) the invocation of protoc is pretty cumbersome and repetitive.

A potential solution could be, to package buffrs and distribute it as npm package (making the installation happen in the background) and provide node scripts for installation and code generation.

[mara-schulke]

#101 is related

[mara-schulke]

So tasks are:

• Publish prebuild binaries for an array of architectures
• Somehow vendor them using npx
• Provide a shell script to do the code compilation and add the protoc npm deps in the npm pkg
• Create a helsing service account for npm
• Publish buffrs to npm

WIP @ https://github.com/helsing-ai/buffrs/tree/mara/npx