feat(form): add form is-disabled storybook

story/select/select.template.js

@@ -5,9 +5,11 @@ import sharedOptions from '../_helpers/shared';
 
 export default () => {
   const isDark = boolean('is-dark', false);
+  const disabled = 'is-disabled';
   const selectOptions = select('class', {
     default: '',
     ...sharedOptions,
+    [disabled]: disabled,
   }, '');
 
   const selectedClasses = classNames(
@@ -18,7 +20,7 @@ export default () => {
 
   return `
     <div class="${selectedClasses}">
-      <select required>
+      <select required ${selectOptions.includes(disabled) && 'disabled'} >
         <option value="" disabled selected hidden>Select...</option>
         <option value="0">To be</option>
         <option value="1">Not to be</option>