Override patch ordering

[bates64]

Currently, dependency patches are applied before the packages that depend on them: https://github.com/nanaian/merlon/blob/main/src/package/registry.rs#L188-L205

@Gorialis has had some thoughts about this: https://discord.com/channels/279322074412089344/1099844075399696394/1101066445472935966

Note: There's no need to do this until a user actually wants this behaviour and we have a concrete use-case to design around.