feat: implement multi token select component

packages/website/ts/components/ui/check_mark.tsx

@@ -0,0 +1,31 @@
+import * as React from 'react';
+
+import { colors } from '@0x/react-shared';
+
+export interface CheckMarkProps {
+    color?: string;
+    isChecked?: boolean;
+}
+
+export const CheckMark: React.StatelessComponent<CheckMarkProps> = ({ color, isChecked }) => (
+    <svg width="17" height="17" viewBox="0 0 17 17" fill="none" xmlns="http://www.w3.org/2000/svg">
+        <circle
+            cx="8.5"
+            cy="8.5"
+            r="8.5"
+            fill={isChecked ? color : 'white'}
+            stroke={isChecked ? undefined : '#CCCCCC'}
+        />
+        <path
+            d="M2.5 4.5L1.79289 5.20711L2.5 5.91421L3.20711 5.20711L2.5 4.5ZM-0.707107 2.70711L1.79289 5.20711L3.20711 3.79289L0.707107 1.29289L-0.707107 2.70711ZM3.20711 5.20711L7.70711 0.707107L6.29289 -0.707107L1.79289 3.79289L3.20711 5.20711Z"
+            transform="translate(5 6.5)"
+            fill="white"
+        />
+    </svg>
+);
+
+CheckMark.displayName = 'Check';
+
+CheckMark.defaultProps = {
+    color: colors.mediumBlue,
+};