[@yearn/web-lib Feature] New Component - TokenCard

[Majorfi]

What

Adding a new TokenCard Component to handle the Token/Value information, similar to the one available on the yearn.finance app.
This should take the StatisticCard as inspiration.
Params should be, at least, the Image source, the label and the value. A callback should be provided onClick.

[edwinzhng]

I can take this!