Figma plugin - UI improvements

[ZuzanaOdstrcilova]

UI improvements

• Optimize colors, icons, tooltips
• Add resize option of window
• Optimize structure/navigation (titles, subtitles in views, collapsing)
• Onboarding for more features - steps

More in Figma: https://www.figma.com/design/WLT6ouNZzURwP2dDl029Gr/Figma-plugin-UX?node-id=2056%3A3797&t=qBF9pNhv0IDa7dvj-1

Improve connection to key

• improve search - after delete of value, show all keys (from platform) - to discussion
• number of keys
• connect/disconnect button
• connect icon with color