Add gap props to CFlex or CStack

[ahmad-reza619]

Is your feature request related to a problem? Please describe.
It looks like when i add gap props or flex-gap, chakra vue doesnt transform it into appropriate css properties, and i have to add it manually through class

Describe the solution you'd like
I'd like it if the CFlex or CStack accept gap or flex-gap as a props, and properly implement the css behind it

Describe alternatives you've considered
an alternative would be to add it to CBox so that it's versatile

Additional context
When i add gap properties, it append it to html elements as attributes, it should not do that

another context: i'm using version 0.10.2