add padding flutter card code example

Example: how to add padding flutter

Padding(
	// Even Padding On All Sides
    padding: EdgeInsets.all(10.0),
    // Symetric Padding
    padding: EdgeInsets.symmetric(vertical: 10.0, horizontal: 5.0),
    // Different Padding For All Sides
    padding: EdgeInsets.fromLTRB(1.0, 2.0, 3.0, 4.0);
    
    child: Child
    (
    	...
    ),
)