Adjust readme repo width

What does this MR do?

This changes the project home and repository view to have a better width suited to display readme.md's. Also it slightly adjusts the readme container.

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

The readme container with the centered text, didn't feel right.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?