Migrate TaskQueue to TypeScript

[marvinhagemeister]

No description provided.

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[jackfranklin]

Hey @marvinhagemeister, really appreciate the help here but unfortunately I've already got a PR for this one that will be merged shortly: #5658

Happy to suggest another file that you could work on if you'd like? I'm sorry about that.

[marvinhagemeister]

@jackfranklin Oh I didn't check existing PRs when I saw your tweet a few minutes ago.