feat: pet overlay rewrite

[Septikai]

A full rewrite of the pet hud to make a lot of improvements and add customisability

Related issue: #95

There is still room for improvement (manually tracking pet exp gain when tab widget is unavailable, Montezuma/rift features, tier boost handling as mentioned below) but this feels complete enough to be added and has been tested extensively under a large number of conditions, with different combinations of tab widget, chat messages and pet menu usage including switching between servers with different widget visibility.

Changes:

• Pet HUD updates when changing/removing pet in the pet menu, not just when opening it
• Pets in pet menu are cached, and when there is no relevant entry in cache it scans the tab widget and any relevant autopet or level up chat messages
• Autopet rules are accounted for
• Changing pet item is accounted for
• Pet HUD is hidden in rift
• Pet exp is tracked in the Pet HUD as it is gained if it can be seen in the tab widget, otherwise just on level up
• 5 visual styles supported (plain, coloured, plain with background, coloured with background, icon only)
• Pet HUD is capable of working even if the pet menu has never been opened using the tab widget or a relevant chat message, and remembers them if you switch server to somewhere the tab widget is not available
• Max level pets and overflow exp are accounted for

Possible Issues:

• Pet Tier Boost is untested as I am not rich enough for that
• I did have one case where on triggering autopet then switching server it reverted the previous pet, but I have been unable to replicate that since

Screenshots

Max Level/Overflow Exp

Styles

Plain

Colour

Plain With Background

Colour With Background

Icon Only

[lineargraph]

This works exceptionally well. There are a couple of edge cases (XP just after a level up), but nothing signficant. Thank you very much.