Merge latest changes from jorgenvatle:vite-bundler fork to prepare for an official release.

[JorgenVatle]

Todo:

• [ ] Migrate Vite to Meteor bundle shim plugin to meteor-vite package.
• [ ] Detect npm packages already bundled by Meteor and rewrite Vite pre-bundler output accordingly. (Fixes https://github.com/JorgenVatle/meteor-vite/issues/33)
• [ ] Add option to ignore shims for a set of user-specified packages in case of compatibility issues.
• [ ] Add ESLint build step
• [ ] Reformat code to satisfy ESLint configuration.
• [ ] Replace references to fork with official repository references.

Superseeds pull requests:

• 43

• 41

I'm writing this up as a superseding pull request so that we can run the ESLint fixes as a final step. Changes from #41's ESLint fixes caused a number of Git conflicts that were tedious to resolve without inadvertently losing history from changes following #41's creation.