Implement arbitrary patch set support

[DenWav]

Patch sets would have properties which define how they are applied and what they are etc.

Example config in Kotlin I came up with on the fly:

patchSets {
    "base" {
        "decomp"()
        "impl" {
            patchType = PatchType.FILE
        }
    }
    "feature" {
        "async" {
            "some-thing"()
            "other-thing"()
        }
    }
}

A language designed for configuration like hocon (or other options) may be better and cleaner. There may be other options and properties for patch sets as well.

This is just for book keeping so I don't forget about building out this functionality.