fix(radio-group): add value to interface and prop types

Radio Group was inheriting the interface from inline control group
which doesn't actually use value. So explicitly declare value just for
Radio Group

.changeset/nervous-moles-sleep.md

@@ -0,0 +1,6 @@
+---
+'@twilio-paste/radio-group': patch
+'@twilio-paste/core': patch
+---
+
+[RadioGroup] Added optional `value` string prop which this component needs and is no longer on the extended `InlineControlGroup` interface.

packages/paste-core/components/radio-group/src/RadioGroup.tsx

@@ -7,6 +7,7 @@ import {RadioContext} from './RadioContext';
 export interface RadioGroupProps extends InlineControlGroupProps {
   name: string;
   onChange: (value: string) => void;
+  value?: string;
 }
 
 const RadioGroup = React.forwardRef<HTMLFieldSetElement, RadioGroupProps>(
@@ -45,6 +46,7 @@ if (process.env.NODE_ENV === 'development') {
   RadioGroup.propTypes = {
     name: PropTypes.string.isRequired,
     onChange: PropTypes.func.isRequired,
+    value: PropTypes.string,
   };
 }