Extend chakra skeleton element to better fit bounty card

[Behold3th]

Is your feature request related to a problem? Please describe.

Describe the solution you'd like
I'd like for the skeleton to be over the individual values of the bounty card, but not to replace the fully bounty card. A good example is zapper.fi/dashboard.

Visually it is a lot more comfortable since there isn't much of a visual difference once the values actually load. Changing the skeleton size to match the bounty card could work, but given you have to extend the skeleton chakra theme, it's probably not much more effort to implement the skeleton loaders on the data fields.

Additional context
Skeleton loader introduced in https://github.com/BanklessDAO/bounty-board/pull/170/files