Add 'Skills' component demo

[AlekseyManetov]

Description Add demo page for 'Skills' components: https://www.figma.com/file/olVxqD2ipLDAYEF1Ibem9M/01.-Skills-Library-(For-Library)?node-id=3101%3A195908 https://www.figma.com/proto/olVxqD2ipLDAYEF1Ibem9M/01.-Skills-Library-(For-Library)?page-id=2485%3A102211&node-id=2500%3A113273&viewport=327%2C48%2C0.14&scaling=min-zoom&starting-point-node-id=2500%3A113273

Describe the solution you'd like Add examples of skills components usage, due the implementation decide which parts we need to move to the UUI(icons, some atomic components) and which pats will leave only in demos