Upgrade Typescript to 5.9.x #16400
Description
Feature Description:
- Upgrade Typescript to 5.9.x.
- Update target to
ES2023as we support >= Node 20 (see https://github.com/microsoft/TypeScript/wiki/Node-Target-Mapping#node-20)
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ES2023 as we support >= Node 20 (see https://github.com/microsoft/TypeScript/wiki/Node-Target-Mapping#node-20)