Create about chakra page

[niccokunzmann]

For each chakra, there should be a page that helps us understand more.

For each chakra, create a page.

• [ ] with the name of the chakra
• [ ] a table of information at the bottom
• [ ] a guide towards how to meditate with it
• [ ] where to put the hand
• [ ] the frequency according to solfeggio

see also #2