fix(system-resources/chat): scroll to bottom and show chat on new message

[minemalox]

Goal of this PR

Currently, when using the included system-resource chat, it does not update the scroll position of the chat window, nor does it unhide the chat window when new chat messages are received.

How is this PR achieving the goal

With the change from Vue 2 to Vue 3, watchers were changed to be shallow, so they only react when a new value is assigned but won't trigger when changing a nested value. By setting the watcher to be a deep watcher again, the chat now scrolls automatically to the last message and shows up briefly when in 'when active' mode.

This PR applies to the following area(s)

Server, system-resources: chat

Successfully tested on

Server build: 8823

Game builds: N/A

Platforms: Windows

Checklist

• Code compiles and has been tested successfully.
• Code explains itself well and/or is documented.
• My commit message explains what the changes do and what they are for.
• No extra compilation warnings are added by these changes.

[jakub-cfx]

Was able to repro the issue, as well as confirm that the proposed fix is working. Thanks for the contribution 😊

[operationairstrike]

Exactly what I need