Arch improvements

[genaray]

First of all, this project is quite interesting :)
I just looked at the arch code and saw that its not optimized.

Arch itself features several different query techniques based on your needs. The used world.Query(...) API is great for rapid prototyping but lacks in performance ^^ https://github.com/genaray/Arch/wiki/Query-techniques

For the maximum possible performance World.InlineQuery, Custom Iteration or Source-Generation is used :)
Just a small side-note. Unfortunately, I don't have time to contribute. But i would like to see an updated version, especially because Arch never ran against unitys ecs before :D