Add support for custom badges

[lamali292]

It's probably not worth pulling it directly, as this would destroy the compatibility with the main branch, since there are no badges on the main branch.
But it's maybe something to look into later
(and maybe even improve my version)

Custom badge implementation

public class MyBadge(SerializableRun run, ulong playerId) : CustomBadge(run, playerId)
{
    public override BadgeRarity Rarity => BadgeRarity.Silver;          // rarity condition
    public override string CustomBadgeIconPath => "res://path/to/icon.png";
    public override bool RequiresWin => false;                         // available on win or loss
    public override bool MultiplayerOnly => false;                     // available in multiplayer only
    public override bool IsObtained() => true;                         // when should this badge be obtained
}

Localization in badges.json

{
    "DOWNFALL-MY_BADGE.title": "My Cool Badge",
    "DOWNFALL-MY_BADGE.description": "My Cool Badge Description"
}

[lamali292]

and i really dont like the AssetCacheLoadAssetPatch either.
It's only there to avoid errors, as I only postfix the missing texture in the other patch.
probably il transpiler surgery can do that better