Introduce htmx in sith files

* Convert FileModerationView into ListView and add pagination with htmx
* Don't allow sas moderation in file moderation view
* Split up base.jinja and introduce base_fragment.jinja
* Improve FileModerationView performances and make it root only
* Add permissions tests for file modération

core/static/webpack/htmx-index.js

@@ -0,0 +1 @@
+window.htmx = require("htmx.org");