Create index.d.ts file

[kolserdav]

• Added file index.d.ts with basic types.
• Added exception in .eslintrc.js (Parsing error: Missing initializer in const declaration.)
• Added type paths to package.json

The types are not described in detail. Only in order to be able to comfortably start working with Typescript. More experienced developers of CKEditor5-React will be able to supplement them much better.

[coveralls]

Pull Request Test Coverage Report for Build 449

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 447:	0.0%
Covered Lines:	183
Relevant Lines:	183

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💛 - Coveralls

[kolserdav]

I wrote types for myself. Decided to do a good deed at the same time. But, unfortunately, I have no time to process the license, if you can’t accept it, you can close this PR and just take my code and paste it yourself, if of course it interests you.

[pomek]

Hi @kolserdav,

Thanks for the amazing work you have done in the PR.

As you might notice, we are in the middle of rewriting the CKEditor 5 project to TypeScript. You can follow ckeditor/ckeditor5#11704 for more details.

Once it is done, we plan to provide typings for integrations with frameworks such as React, Vue, or Angular.

So far, I am not going to close the PR. Still, unfortunately, I cannot merge it as we will be rewriting the integrations to TypeScript, and typings will be provided automatically. I can't promise any ETA, though.