fix: add tsdoc comments to KnownProps

[SunsetTechuila]

reference: https://spec.editorconfig.org/#supported-pairs

simplifies plugin development by eliminating the need to check the specification.

[coveralls]

Pull Request Test Coverage Report for Build 15568850825

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 48 of 48 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.006%) to 99.889%

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Totals
Change from base Build 15567359814:	0.006%
Covered Lines:	762
Relevant Lines:	762

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💛 - Coveralls

[hildjj]

Waiting for #138, then a quick rebase.

[SunsetTechuila]

rebased

[hildjj]

Please add yourself to the contributors section in package.json, and I'm ready to merge.