Workflow templates (#938)

* Add template gallery

* Add simple test

* Add examples

* Enable floating menu in test

browser_tests/helpers/templates.ts

@@ -0,0 +1,12 @@
+import { Locator, Page } from '@playwright/test'
+export class ComfyTemplates {
+  readonly content: Locator
+
+  constructor(readonly page: Page) {
+    this.content = page.getByTestId('template-workflows-content')
+  }
+
+  async loadTemplate(id: string) {
+    await this.content.getByTestId(`template-workflow-${id}`).click()
+  }
+}