Write Javascript binding

While it is not a feature required for our use case, if someone is interested, they can explore implementing it.

## Approach 1: Build WebAssembly

In my opinion, compiling to WebAssembly (WASM) is unrealistic. To support WASM compilation, we would need to add bindings for the raft-rs module, while implementing the network and storage layers in JavaScript. To achieve this, a refactoring of raftify to abstract the network and asynchronous runtime layers would be necessary beforehand.

## Approach 2: Build Node.js native binding using `neon` or `napi-rs`

More exploration is needed, but this approach seems more realistic than the first one.