Fix #3435 - CommonJS and ESM loading confusion

[tomi-bigpi]

• Fix TipTap getting loaded as CommonJS when the intent is to use the ES Module version.
• Use .cjs and .mjs file extensions to help resolution in Node
• package.json change also makes explicit exports required
• Update core utilities exports to include all utilities
• Update tests to use exported utilities

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[bdbch]

Thanks @tomi-bigpi

since the PR is quite large I'll need some time to review it locally. I'll get back to you when I'm done!

[bdbch]

I didn't find any issues while testing this locally. The code also looks fine to me and the change makes sense. I'll merge it for now to see if we'll have issues with the new script names with the next release.

Thanks for your support @tomi-bigpi

[tomi-bigpi]

I didn't find any issues while testing this locally. The code also looks fine to me and the change makes sense. I'll merge it for now to see if we'll have issues with the new script names with the next release.

My take is that the likeliest thing to break is if anyone is directly importing any files as the exports option also requires explicit exports of classes/functions/etc. (In addition to the issue mentioned above)

Thanks for the quick turnaround!