Changes:
* Refactors the Node module to load the shared library from a separate
package. When a user does `npm install vectordb`, the correct optional
dependency is automatically downloaded by npm.
* Brings Rust and Node versions in alignment at 0.1.2.
* Add scripts and instructions to build Linux and MacOS node artifacts
locally.
* Add instructions for publishing the npm module and crates.
- Core rust library
- ffi bridge that exposes rust functionality to javascript
- npm package that provides a TypeScript / JavaScript library
- limitations: it only supports reading for now
