Update: Contract Score

[tgladilina]

1. please update colors for light and dark themes:

Security score is GREAT

• gray border color for all scores
• green 600 (light) green 400 (dark)

Security score is LOW

• gray border color for all scores
• purple 600 (light) purple 400 (dark)

Security score is Critical

• gray border color for all scores
• red 600 (light) red 400 (dark)

2. Could we show the loader for a score?

Figma file:
https://www.figma.com/file/4In0X8UADoZaTfZ34HaZ3K/Blockscout_2.0?type=design&node-id=15393-98948&mode=design

[isstuev]

2 - we don't know if a contract has a score or not, so if we replace our skeleton with that loader -- idk how to process the case with empty response or method error