XState Catalogue is a collection of professionally designed state machines you can drop into your projects. Get started by browsing the catalogue, interacting with the machines, and copying the code.
You can read more about this version v0.1.0 on the official website.
This lets you manage the source code like a stat machine with interactions from different states.
The catalog with these states is in development but is a good start if you want to manage a complex development in a much easier way.
You can install it easily with the npm tool and test some examples from the npm website.