feat: Add format revealed data

[tecnoloco]

This will add the capability to format revealed data according to VGS Show Android and IOS documentation.

Example of usage

import VgsShowAttribute from 'vgs-show-react-native';
// ...
const vgsShow = React.useRef<VgsShowAttribute> = null;
<VgsShowAttribute
  ref={vgsShow}
  initParams={{
    environment: ENV,
    vaultId: VAULT_ID,
    // optional, if needed for the upstream service
    customHeaders: {
      Authorization: 'Bearer ' + customerToken,
    },
  }}
  format={{
    pattern:"(\\d{4})(\\d{4})(\\d{4})(\\d{4})"
    template:"$1 $2 $3 $4"
  }}
  contentPath="data.attributes.pan"
  placeholder="Value will appear here"
  style={styles.box}
/>;
// To trigger reveal:
<Button onPress={vgsShow.current?.reveal(PATH, METHOD, CUSTOM_PAYLOAD)}>