The slow local documentation build might be due to downloading Weblate's icons.

When I tried to build the Chinese documentation locally, I found that there were hundreds of download requests to Weblate during the build process, and the amount of data requested was the same.

Investigating `conf.py`, I discovered that it should be the Weblate widget in `rst_epilog `that needs to download images. After downloading the Chinese Weblate images locally and changing the image address to an absolute local path, the build time was reduced to within a few minutes instead of more than half hour.

Additionally, I only found one reference to a `weblate-widget` in `index.rts`. Is there another way to implement it instead of downloading weblate images for every document page?

https://github.com/godotengine/godot-docs/blob/c37184acc9002561de0b9a6453cdb27f116ec058/conf.py#L309-L318

The built index page still needs to be online to download this translation status icon, which is completely pointless.