Update package.json

- Added "homepage": "https://futuretechvision-global.github.io/quantumca" to package.json
  → Ensures Vite builds with correct base path for assets on GitHub Pages
- Added "deploy" script: runs `npm run build` followed by `gh-pages -d dist`
  → Enables one-command deployment to gh-pages branch
- Added gh-pages to devDependencies for consistent local and CI/CD publishing
- No changes to existing dependencies, build, lint, or preview scripts
- Next step: optionally add predeploy tasks (npm audit fix, browserslist update) for security and compatibility

Author: FutureTechVision-Global