Add fractal visualization feature

Introduce a new Fractal visualization: adds FractalComponent (template, styles, TS), FractalService (rendering, palettes, Mandelbrot/Julia/Burning Ship/Newton implementations), and Fractal model/types. Wire up routing and router constants (route and component import), add wiki links to UrlConstants, and expose the new algorithm in AlgorithmsService. Also add i18n entries (en/de) for UI labels and explanations. Component supports canvas zoom/drag, color schemes and iteration controls.

src/app/constants/RouterConstants.ts

@@ -6,6 +6,7 @@ import {PathfindingComponent} from '../pages/algorithms/pathfinding/pathfinding.
 import {SortingComponent} from '../pages/algorithms/sorting/sorting.component';
 import {ConwayGolComponent} from '../pages/algorithms/conway-gol/conway-gol.component';
 import {LabyrinthComponent} from '../pages/algorithms/pathfinding/labyrinth/labyrinth.component';
+import {FractalComponent} from '../pages/algorithms/fractal/fractal.component';
 
 export class RouterConstants {
 
@@ -51,6 +52,12 @@ export class RouterConstants {
     COMPONENT: LabyrinthComponent
   };
 
+  static readonly FRACTAL = {
+    PATH: 'algorithms/fractal',
+    LINK: '/algorithms/fractal',
+    COMPONENT: FractalComponent
+  };
+
   static readonly IMPRINT = {
     PATH: 'imprint',
     LINK: '/imprint',