fix(core): State merging order invalid

When chains of game states were merged, the last merge state was often lost.

packages/kitten-scientists/source/state/StateMerger.ts

@@ -10,7 +10,7 @@ export class StateMerger {
   }
 
   merge<T extends Record<string, unknown>>(base: T): T {
-    let stateSubject = deepMergeLeft(base, mustExist(this.state.state)) as T;
+    let stateSubject = base;
 
     for (const child of this.state.children) {
       let childState = mustExist(child.state);
@@ -21,6 +21,8 @@ export class StateMerger {
       stateSubject = deepMergeLeft(stateSubject, childState) as T;
     }
 
+    stateSubject = deepMergeLeft(stateSubject, mustExist(this.state.state)) as T;
+
     // Clean up merged state.
     (stateSubject as Record<string, string>).$schema =
       "https://schema.kitten-science.com/working-draft/settings-profile.schema.json";