Added vitest and broke up components

src/tokenList.test.ts

@@ -0,0 +1,9 @@
+// @vitest-environment jsdom
+
+import { expect, test } from 'vitest'
+import { tokenList } from './tokenList'
+const tokenListElement = tokenList();
+
+test('displays an empty list', () => {
+    expect(tokenListElement).toBeDefined()
+})