refactor: Significantly refactor how conditions work internally (#1886)

- Much improved API cleanliness and testability to allow further
extensibility in future
 - Simplified code in `live` view

This technically contains a small change in how overrides work in the
`live` view. Since that change is _closer_ to the documentation, and
since this is likely to be rarely used, this is not considered a
breaking change. Previously, overrides for a given live camera would
always render _as if_ that camera was selected, vs was actually
selected. Now, overrides will only apply in the live view when the
camera is _actually_ selected. If this is an issue for you in practice,
lets discuss.

src/card-controller/expand-manager.ts

@@ -32,7 +32,7 @@ export class ExpandManager {
   }
 
   protected _setConditionState(): void {
-    this._api.getConditionsManager()?.setState({
+    this._api.getConditionStateManager()?.setState({
       expand: this._expanded,
     });
   }