chore: update TypeScript to v7

[sethamus]

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• I have read the contributing guidelines.

AI acknowledgment

• I did not use AI to generate this PR.
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What is the purpose of this pull request?

This PR updates TypeScript to v7.

What changes did you make? (Give an overview)

Updated typescript to ^7.0.2 and replaced the 7.x tests with 6.x tests.

Related Issues

eslint/eslint#21070

Is there anything you'd like reviewers to focus on?

[DMartens]

Can you please checkout the CI problem.
The problem seems to be that the example in examples/typescript uses typescript-eslint which cannot use TypeScript 7 yet as it has no API.
This can be circumvented by also providing TypeScript 6 as described in the release note.

[lumirlumir]

If there’s no clean solution for this, I think another possible approach would be to mark this PR as blocked, like in the eslint, rewrite, and js repositories, as mentioned in eslint/eslint#21070.

Since the generated .d.ts files would be the same with TS 6 and TS 7 (and TS 6 was mainly intended to bridge the transition to TS 7), I don’t think there’s a need to rush this PR.

Also, the type tests still run against the latest @typescript/native-preview, which should be very close to typescript@7.0.2.

[sethamus]

I agree with lumirlumir. There's no need to rush this, so I'll convert this PR to a draft for now.