Support for runtime code-centric mods has been built in from the start. The game has been programmed from a "hook" perspective and I will make sure we release documentation on how this works once we fully release.
I've also already looked into Harmony / other runtime patchers in the past to check compatibility and we're explicitly keeping things in C# (as opposed to IL2CPP) to provide mod support for this.
My plan is to release a public example project that shows how to use it.