Wrap fastembed in try catch to allow non node environments to build

[antpb]

Relates to: #507

Non node.js environments may have issues building because of some packages and how they are imported.

##To Reproduce

Make a worker, include eliza/core and attempt to build. It will throw an error similar to

✘ [ERROR] No loader is configured for ".node" files:
node_modules/@anush008/tokenizers-darwin-universal/tokenizers.darwin-universal.node

  node_modules/@anush008/tokenizers/index.js:116:32:
    116 │ ... nativeBinding = require('@anush008/tokenizers-darwin-universal')

Expected behavior

This PR wraps the import in try catch to gracefully fail and allow the build.

[monilpat]

LGTM - thanks for getting this out!