Authenticated media support

[strk]

Newer Matrix releases resulted in impossibility to access uploaded media without sending an authentication header.

https://matrix.org/blog/2024/06/20/matrix-v1.11-release/

This breaks the weechat way to access those resources, which relied on a simple url.

I guess it would take some matrix-aware script to grab the url and send an authenticated request ?

The python version is also affected: https://github.com/poljar/weechat-matrix/issues/369