switch from npm to bun for faster dependency resolving

[bdbch]

Changes Overview

This PR moves away from npm in favor for bun to speed up package resolvement & caching.

Implementation Approach

I replaced the package-lock with a new bun.lockb and updated all scripts & Github actions accordingly

Testing Done

I ran builds, the dev setup & linting locally.

Additional Notes

This is not super crucial and needs a bit of testing because of the Github Actions changes.

Checklist

• [x] I have created a changeset for this PR if necessary.
• [x] My changes do not break the library.
• [x] I have added tests where applicable.
• [x] I have followed the project guidelines.
• [x] I have fixed any lint issues.