Enhance Registration Form Layout and UI

## Description

- The register form is much larger compared to the image, causing the layout to look uneven and unbalanced.
- On mobile screens, the image is not visible, which affects the overall user experience.
- The text on the green background lacks contrast, making it hard to read.

## Expected Behavior

- Register form size should be adjusted to better match the image size for a balanced layout.
- Image should be visible and properly sized on all screen sizes, including mobile devices.
- Text on the green background should be black to improve readability and contrast.