docs(ui): overview-examples add

[32penkin]

Please read and mark the following checklist before creating a pull request:

• I read and followed the CONTRIBUTING.md guide.
• I read and followed the New Feature Checklist guide.

Closes #442

[artyorsh]

• Add ApplicationProvider, styled, withStyles simple usage examples to an overview section
• Let's unify example titles for each component:
  -- Button Simple usage example -> Simple Usage
  -- Button Eva styling example -> Eva styling
• We can omit the word example from an example title :)
• Let's replace and API examples with only simpler one demonstrating a minimum code needed to create a working component. Or we can split this example into 2 examples: Simple usage and API
• If an example A and example B contains similar parts of code, we need to paste it so user can simply copy and paste
• Consider splitting examples to multiple rather than combining them (e.g tooltip inline styling and with icon)

I've left a few comments in the code for some of the components, but most of the other components have the same documentation issues

[artyorsh]

Please follow the comment above

[artyorsh]

@32penkin can we also include fixes for #565 in this pr?

[artyorsh]

Good work 👍 But needs some changes to make it even better