Add algorithms section with pathfinding visualizer

Introduces a new 'Algorithms' section, replacing the previous 'Hobbies' page. Adds components, services, and models for algorithm categories and a pathfinding visualizer supporting Dijkstra and A* algorithms. Updates navigation and i18n files to reflect the new section and removes all hobbies-related files.

src/app/pages/about/about.component.html

@@ -65,7 +65,7 @@
     </div>
   </mat-card>
 
-  <mat-card class="experience">
+  <mat-card class="experdience">
     <h2>{{ 'ABOUT.SECTION.EXPERIENCE' | translate }}</h2>
     <div class="xp-list">
       @for (entry of xpKeys; track entry.key) {