Add Prettier without custom configuration and CI integration

[devin-ai-integration]

This PR adds the following changes:

• Add Prettier as a dev dependency
• Add Prettier scripts to package.json
• Add Prettier check to CI workflow
• Use Prettier's default configuration without a custom .prettierrc file

Link to Devin run: https://app.devin.ai/sessions/a11812ab231c41a1b927564cf3ea0fa8
Name: hinoshita1992@gmail.com

[devin-ai-integration]

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