state: Connect the animation state machine to the rest

This ensures that the new state machine is fed events, as well as that its results are applied.

The old ad-hoc system is removed.

There is one regression where the last layout will be used when the panel is brought up manually.

src/lib.rs

@@ -27,6 +27,7 @@ pub mod imservice;
 mod keyboard;
 mod layout;
 mod locale;
+mod main;
 mod manager;
 mod outputs;
 mod popover;