chore: disable TypeScript's nightly workflow

[mrazauskas]

Type

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Description

This PR disables the TypeScript Nightly workflow.

In preparation for TypeScript 7, the nightly releases are currently disabled in TypeScript repo. I asked on Discord and it was confirmed that there will be no more nightly release of 6.x series.

Currently the daily workflow in this repo is testing against the same typescript@6.0.0-dev.20260416 (see the logs). As soon as TypeScript will start publishing nightly releases of 7.x series the workflow will fail, because TSTyche does not support TypeScript 7 yet (this is because programatic API is not yet available).

There is no value of the workflow at the moment. (As an alternative: the workflow file could be removed altogether.)

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Latest commit: 4490d81

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