Add Prim/Kruskal maze gen & nodeData refactor

Implement Prim and Kruskal maze generation in the Labyrinth component with animated generation and UI guards. Introduces isAnimationRunning signal, mazeAnimationSpeed, maze node order tracking and animateMazeGeneration; createRandom(now takes a boolean) triggers either Prim or Kruskal flow, sets random start/end, and animates. Refactor Node.distance -> nodeData across models, components and the PathfindingService (Dijkstra/A*) to use nodeData for g-scores/ids. Add SharedFunctions.shuffleArray utility and update i18n (EN/DE) with labels for Prim/Kruskal. Misc: minor cleanup/init changes and drawing logic adjustments to support the new maze flows.

src/app/shared/SharedFunctions.ts

@@ -14,4 +14,12 @@ export class SharedFunctions {
   static randomEventIntFromInterval(interval: number): number {
     return Math.floor(Math.random() * (interval / 2)) * 2;
   }
+
+  static shuffleArray<T>(array: T[]): T[] {
+    for (let i = array.length - 1; i > 0; i--) {
+      const j = Math.floor(Math.random() * (i + 1));
+      [array[i], array[j]] = [array[j], array[i]];
+    }
+    return array;
+  }
 }