Add map refresh

[PunkPun]

Closes #19420

This is my first code contribution to ORA, so there's probably a lot of room for improvement

The way map refresh works:
MapCache has 2 instances of MapDirectoryTracker tracking both the custom and official maps folders for changes respectively. When they detect something, they analyse what and if they need to take action, then they put or edit appropriate actions in mapActionQueue. Whenever MapCache is queried for maps, it is updated from the records in mapActionQueue

I needed to queue actions because FileSystemWatcher is spamming quite a lot and those actions are often in an illogical order. F.e. when I add a file it calls Changed, then Created. Another example is when I add / edit an uncompressed map, then it spams a ton of actions. Furthermore maps are never deleted from MapCache. So if we were to update MapCache at every FileSystemWatcher event it would likely clog up memory with very similar maps. The queue is designed to address all of this by updating MapCache only when it is required

Map editor no longer updates the cache, since it already happens when when MapDirectoryTracker kicks in

The game now selects the last edited map when entering map chooser. If in lobby the selected map is updated it, it will switch to the updated version. I'm not sure if this change is necessary, but it would be fairly convenient.

[PunkPun]

Fixed all bugs and crashes I could find. I changed ComputeUID to include map.png. This change should be done in another pr, but I added it here temporarily as it is a very noticeable bug #19891

[PunkPun]

rebased

[PunkPun]

Now when a user picks a map in map chooser that has been updated while user was in map chooser window, the game will act as if nothing was selected and exit.

I also separated MapDirectoryTracker class into it's own file and rebased

[PunkPun]

Now when you force start or click on a ready checkbox, the game properly handles the selected map becoming unavailable. The previous behaviour was quite unpolished. On game start the screen become black, and then the lobby is refreshed.

[PunkPun]

Handled a crash. Now if you try to play a map in MissionSelector that has been marked as unavailable you will exit MissionSelector. Same behaviour as Map Editor MapChooser

[PunkPun]

Now when you force start or click on a ready checkbox

I undid the checkbox behaviour (but kept force start). My solution felt a bit hacky and honestly unnecessary. It's a minor polish feature that can be added in a followup pr

[PunkPun]

rebased and changed console reporting from "Added 'map'" to "'map' was added"

I'm unsure wether we should keep this reporting. For me it made sense to exist, however when looking back on it, you wouldn't really use it for anything

[Mailaender]

I am fine with it, as the map editor also reports file system changes that way.

[Mailaender]

Changelog