add aria labels on vue node widgets (2/2) (#6037)

## Summary

Continuation of https://github.com/Comfy-Org/ComfyUI_frontend/pull/6032

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6037-add-aria-labels-on-vue-node-widgets-2-2-28b6d73d365081d68795f5dfaca0b89a)
by [Unito](https://www.unito.io)

src/locales/en/main.json

@@ -17,6 +17,11 @@
     "chart": "Chart",
     "chartLowercase": "chart",
     "file": "file",
+    "selectedFile": "Selected file",
+    "none": "None",
+    "markdown": "markdown",
+    "content": "content",
+    "audioProgress": "Audio progress",
     "viewImageOfTotal": "View image {index} of {total}",
     "viewVideoOfTotal": "View video {index} of {total}",
     "imagePreview": "Image preview - Use arrow keys to navigate between images",