This add the final list of settings in the main setting window as a new page notifications as there are quite a few now. This completes previous work on push rules giving the ability to set the default global rules. Adding keyword rules is also now supported.
This also uses the new mobileform layout. The settings are designed to give some visual feedback as options for whether notifications are on/off, play a sound or are highlighted are chosen. The left icon is designed to mimic the notification dot in the roomlist. The whole mobileform delegate can also be clicked to cycle through the available options.
The rationale for whether an option is available is as follows:
- Highlight is not available if would lead to every message in a room being highlighted
- Keyword notifications cannot be switched off instead the rule is just deleted
- Only keyword rules can be deleted, default rules cannot be touched
There is also rules plumbed in for features that don't exist in neochat yet, i.e. encrypted chats and rooms, calls. I figured I may as well plumb these in and test them my plan was to hide them before merge, they can then be unhidden when the features are complete.

For yet unknown reasons, sometimes invalid mentions are inserted into the list, which will mess up all further messages. While finding those bugs is the better approach, these checks should also be useful.
Resolve https://invent.kde.org/network/neochat/-/issues/547
This patch attempts to add proxy config support to NeoChat so people could set a HTTP or Socks5 proxy for anonymity or privacy/censorship-circumvention reason.
Currently this will only allows setting proxy type, host and port (which should be usable for most of the cases). Settings in that page needs to be applied by clicking the Apply button so the proxy setting won't accidentally get changed.
Proxy is disabled (use System Default option) by default.
Use animated images in imageDelegate and FullScreenImage so that animated images can be viewed.
Note webp animated images don't work this is a bug with qt see https://bugreports.qt.io/browse/QTBUG-70245
Update the base item in the timeline container to be a column layout. This means that all the items can be laid out automatically without the need to set lots of manual settings and anchoring.
The overall height calculation for the delegate is vastly simplified (in fact it is removed) which deals with the fact that there were still instances where the manual calculation didn't work e.g. a delegate with a reaction followed by another message from the same user didn't give the correct bottom margin (see below)
before:

after:

This also improves upon the recently changed hover highlight behaviour. The previous patched moved it to cover the avatar as well as the bubble however it also covered the section and reaction when present which didn't look good. The highlight now only covers the avatar and bubble
before:

after:

This also cleans up some of the margins in both bubble and compact to ensure consistency.