Move shlink-web-component tests to their own folder

shlink-web-component/test/__mocks__/Window.mock.ts

@@ -0,0 +1,18 @@
+import { fromAny, fromPartial } from '@total-typescript/shoehorn';
+
+const createLinkMock = () => ({
+  setAttribute: vi.fn(),
+  click: vi.fn(),
+  style: {},
+});
+
+export const appendChild = vi.fn();
+
+export const removeChild = vi.fn();
+
+export const windowMock = fromPartial<Window>({
+  document: fromAny({
+    createElement: vi.fn(createLinkMock),
+    body: { appendChild, removeChild },
+  }),
+});