create about page

[ihor-bobyr]

create https://programming.org.ua/en/about https://github.com/shpp/programming.org.ua/tree/master/src/pages/about-us-page

• [x] reuse https://github.com/ihor-bobyr/programming.org.ua/issues/18
• [x] separate good school manifesto from https://github.com/ihor-bobyr/programming.org.ua/issues/1 and reuse
• [x] implement philosophy slider section
• [x] implement dream slider section
• [x] implement mentors slider section
• [x] implement main text section
• [x] implement support us section

[ihor-bobyr]

this issue should be done after this https://github.com/shpp/programming.org.ua/issues/19 because of separate of details section into component