Chairloader patch merging

[tmp64]

Currently Chairloader patch files are just copied over after all other mods. It would be nice to allow mods to merge changes into them (but only of the file is defined in the merging library). For instance, the new entity spawn list (f1f82c63a2546456e061725a313f658233cb45ba) should be extendable by mods but this code doesn't work at the moment.

<!-- Data\Libs\Chairloader\Trainer\EntitySpawnList.xml -->
<?xml version="1.0"?>
<EntitySpawnList>
    <Category Header="Typhon">
        <Category Header="Mimics">
            <Npc Name="ArkNpcs.Mimics.Mimic.MyMimic">My Mimic</Npc>
        </Category>
    </Category>
</EntitySpawnList>