Add support to style individual parts of mixed blocks such as Tag cloud, Search, Rating

[madhusudhand]

What is the problem?

Few blocks such as Tag cloud, Search, Rating are a group of items created as single block and it is not possible to style individual items.

Example 1: Tag cloud

Tag cloud block currently supports only typography and layout for the entire block.
If the tag cloud item needs settings such as border radius for outline variation, or adjusting padding of an item, it is not possible via global styles.

Use cases:

Set border radius

Set hover state

Example 2: Search

Similarly in a search block, it is not possible to style the border of search input such as adding border radius to match button.

Example 3: Rating block

In rating block, it is not possible to define a different styles for active vs inactive stars

What is your proposed solution?

Add way to style these blocks at individual item level.