Add 'Clone' feature to file tree (#5232)

* Add 'Clone' file / folder feature to file tree

* E2E Test: clone file in file tree

* Don't stat if there's no target

e2e/playwright/test-utils.ts

@@ -552,6 +552,16 @@ export async function getUtils(page: Page, test_?: typeof test) {
       })
     },
 
+    cloneFile: async (name: string) => {
+      return test?.step(`Cloning file '${name}'`, async () => {
+        await page
+          .locator('[data-testid="file-pane-scroll-container"] button')
+          .filter({ hasText: name })
+          .click({ button: 'right' })
+        await page.getByTestId('context-menu-clone').click()
+      })
+    },
+
     selectFile: async (name: string) => {
       return test?.step(`Select ${name}`, async () => {
         await page