Added Example Component and testing framework

Signed-off-by: Avior <florian.bouillon@delta-wings.net>

__tests__/components/HelloWorld.test.tsx

@@ -0,0 +1,14 @@
+import React from 'react'
+import renderer from 'react-test-renderer'
+import HelloWorld from '../../components/HelloWorld'
+
+/**
+ * Example Test
+ *
+ * on first run it will generate a .snap file and after will compare result with it
+ */
+
+it('render a h1', () => {
+	const tree = renderer.create((<HelloWorld>Test</HelloWorld>)).toJSON()
+	expect(tree).toMatchSnapshot()
+})