Selector in Element.matches() should type narrow

[voxpelli]

Adds TypeScript overloads for the matches method.

The overloads leverages the HTMLElementTagNameMap similar to how overloads are handled for methods like querySelector, but here for type narrowing by making it eg. this is HTMLElementTagNameMap[K].

Tests have been run locally and are passing.

Changes:

• Added a new function emitMatchesOverloads to generate overload signatures for the matches method.
• Updated the main emitter logic to call emitMatchesOverloads when processing the matches method.

[github-actions]

Thanks for the PR!

This section of the codebase is owned by @saschanaz - if they write a comment saying "LGTM" then it will be merged.

[voxpelli]

@microsoft-github-policy-service agree company="040 Internet AB"

[saschanaz]

LGTM for now, but I think this should ultimately move to a patch rather than in the emitter itself.\

[github-actions]

There was an issue merging, maybe try again saschanaz. Details

[voxpelli]

@saschanaz Weird error: "HttpError: Repository rule violations found New changes require approval from someone other than the last pusher. "

[jakebailey]

It's unfortunately normal, the infra was written before new rules required approval from someone with merge perms (defeating the purpose more or less).

I wasn't sure if the comment was an actual ask to merge or not, but I can just approve it.

[saschanaz]

LGTM

[github-actions]

Merging because @saschanaz is a code-owner of all the changes - thanks!