Update usage page colors and styles for the table content

[gtsiolis]

Problem to solve

Following up from https://github.com/gitpod-io/gitpod/pull/11481, the new usage page table contains data that lacks proper layout, alignment, colors and more to create good information hierarchy.

CURRENT	DESIGN SPECS

[gtsiolis]

Cross-posting designs from https://github.com/gitpod-io/gitpod/issues/11640#issuecomment-1199258447:

Light theme

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[gtsiolis]

Closing this as usage layout and colors have been updated.