Addressing a few UX concerns with the generate data modal

• Primary CTA button should be bottom right
• No “x” button in top right. Add a secondary Cancel button to the left of the Generate button
• Add more padding between the prompt box and the button

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!