* Implement subscription ordering into EventBus.
* Topological helpers, rest of code uses shared topological sort, fix bugs.
* Fix tests.
Didn't realize that multi-subscriptions are allowed on input handlers like that??
* Improve and use topological sort helpers more.
* Removed the Interfaces folder.
* All objects inside the GameObjects subfolders are now in the GameObjects namespace.
* Added a Resharper DotSettings file to mark the GameObjects subfolders as not providing namespaces.
* Simplified Robust.client.Graphics namespace.
* Automated remove redundant using statements.
It's now parallelized which cuts off ~200ms on its own for me.
Config is now shared between multiple loads which saves a lot as well.
All in all, pretty good.
Removed use of ConcurrentDictionary. It was slow.
Other minor optimizations around the codebase.
Added option for parallel game state generation. Seems slower than doing it single-threaded so off by default for now.
This is necessary because content now loads the preferences database from the thread pool. This causes the assembly loads for that (they're lazy by the runtime) to run in that thread, which means that the resolver callback we set up in ModLoader did not work (it has to do an IoC resolve).
This change creates a new AssemblyLoadContext for every ModLoader and as such we can tie the loading in said context to a specific ModLoader, thus cutting out the need for a static IoC resolve.
This also paves the way to assembly unloadability a bit.
They no longer load system-wide config or user data.
User data is emulated through a VFS.
Also added more hooks to improve the customizability of the test,
for example allowing content to hijack their IoC registrations.
