fix(docs): remove typography-block applied globally

[m0ksem]

• Updates sidebar accordion to Figma
• closes VaContent should be applied to doc block, not whole page #2260
• closes Standard for documentation page #2850
• closes When I select Avatar in search - collapse for that item is not expanded. Expecting to be selected and collapse expanded. #3592
• closes Maybe in navigation we can highlight category of current page? #3593
• Improve contribution docs (@pogrib0k suggestions for newcomers)
• closes On certain screen size - you don't have code sandbox. We should have an icon or something similar. Should also have different color (be more bright on select). #3596
• closes (Awful colors in this example #3597)
• closes (When I select Avatar in search - collapse for that item is not expanded. Expecting to be selected and collapse expanded. #3592)

Mobile icons (#3596)

ColorClasses demo (#3597)