Support formatting (prettier?)

[nichochar]

Add Prettier Support to TypeScript Notebook

Objective

Integrate Prettier (or alternative, maybe biome?) for code formatting in our TypeScript notebook app.

Requirements

1. Implement Prettier formatting for TypeScript cells
2. Add auto-format option in app settings
3. Create a format button in the cell action bar, for doing it manually on a per-cell basis

Implementation Steps

1. Install Prettier and necessary plugins to default package.json
2. Integrate Prettier with CodeMirror editor
3. Implement formatting function for individual cells
4. Add auto-format toggle to app settings
5. Design and implement format button in cell action bar