Rename project back to xpaintai in package.json and metadata.json; add QuestionMarkIcon component; enhance AI features with ask functionality in useAiFeatures hook and App component

Rename project from xpaintai to paintai; update canvas dimensions and AI API endpoint; enhance AI features with dimensions mode

Refactor App component for improved readability and update unzip script to extract zip files before copying README

Initialize xpaintai project with core files and basic structure