Internal: Use import.meta.resolve instead of require.resolve.

[filipsobol]

Suggested merge commit message (convention)

Internal: Use import.meta.resolve instead of require.resolve. Fixes #17671.

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We've added the exports field to the package.json files with types and import fields, but no require because our packages are ESM-only. This is the reason for the require.resolve call fails.

[pomek]

According to:

• https://ckeditor.com/docs/ckeditor5/latest/framework/contributing/development-environment.html#requirements
  
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/import.meta/resolve:
  

The proposed solution cannot be used.

[Witoso]

If this blocks us for good, we can bump it as it is our internal dependency. (But I understand it needs to be tested across all things)

[filipsobol]

According to Node.js docs, it's available in Node 18 too. I use Node 18.20 and it worked.

https://nodejs.org/docs/latest-v18.x/api/esm.html#importmetaresolvespecifier