Docs: Add stories for createCompositeBlockSelectField

[johnnyomair]

Description

Showcases basic and with icon variants.

[johnnyomair]

@jamesricky the icons look off. This is probably fixed with #2919, right?

[jamesricky]

@jamesricky the icons look off. This is probably fixed with #2919, right?

No that's a different issue, should be fixed with https://vivid-planet.atlassian.net/browse/COM-1598

The problem is that MuiSelect-input doesn't support any content other than text by default.

[johnnyomair]

The problem is that MuiSelect-input doesn't support any content other than text by default.

I meant in the list. But you're right, we'll have to fix it in the input as well.

[jamesricky]

The problem is that MuiSelect-input doesn't support any content other than text by default.

I meant in the list. But you're right, we'll have to fix it in the input as well.

Ah yes, the icon in the list will be fixed with the PR you mentioned.