TypeScript Quick Start Tutorial snippet change

[joserodrigorojo]

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name: :memo: Documentation Fix about: Fixing a problem in an existing docs page

Checklist

• [ ] Is there an existing issue for this PR?
• [x] Have the files been linted and formatted?

What docs page needs to be fixed?

• Section: Tutorials
• Page: TypeScript Quick Start

What is the problem?

The app/store.ts code snippet in the TypeScript Quick Start Tutorial should be updated to include the export keyword for the store constant, as demonstrated in the full example hosted in CodeSandbox within the same page and the snippet for the same file shown in the Code Quality > Usage with TypeScript > Define Root State and Dispatch Types page.

What changes does this PR make to fix the problem?

This PR adds the export keyword to the store constant declaration in the app/store.ts file snippet, aligning with the implementation in the CodeSandbox example and other docs.

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[markerikson]

Thanks!