docs(readme): update banner

docs(readme): full-width banner

fix(readme): add empty line

feat(readme): colored banner

fix(readme): gap with badges

fix(readme): another banner

fix(readme): another bg color

fix(readme): another bg color 2

fix(readme): light mode banner background

fix(readme): another bg color 3

fix(readme): new light mode banner

fix(readme): another bg color 4