renames client to admin, sets up component library

src/admin/components/forms/Submit/index.js

@@ -0,0 +1,33 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { useForm, useFormProcessing } from '../Form/context';
+import Button from '../../elements/Button';
+
+import './index.scss';
+
+const baseClass = 'form-submit';
+
+const FormSubmit = ({ children }) => {
+  const processing = useFormProcessing();
+  const { disabled } = useForm();
+
+  return (
+    <div className={baseClass}>
+      <Button
+        type="submit"
+        disabled={processing || disabled ? true : undefined}
+      >
+        {children}
+      </Button>
+    </div>
+  );
+};
+
+FormSubmit.propTypes = {
+  children: PropTypes.oneOfType([
+    PropTypes.arrayOf(PropTypes.node),
+    PropTypes.node,
+  ]).isRequired,
+};
+
+export default FormSubmit;

src/admin/components/forms/Submit/index.scss

@@ -0,0 +1,5 @@
+form > .form-submit {
+  .btn {
+    width: 100%;
+  }
+}