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.

tests/card-controller/view/view-manager.test.ts

@@ -45,7 +45,7 @@ describe('should act correctly when view is set', () => {
     expect(api.getCardElementManager().scrollReset).toBeCalled();
     expect(api.getMessageManager().reset).toBeCalled();
     expect(api.getStyleManager().setExpandedMode).toBeCalled();
-    expect(api.getConditionsManager()?.setState).toBeCalledWith({
+    expect(api.getConditionStateManager()?.setState).toBeCalledWith({
       view: 'live',
       camera: 'camera',
       displayMode: 'grid',