Add pendulum demo and WGSL support

Introduce a new Pendulum demo (component, template, stylesheet) and wire it into routing and the algorithms list. Extend Babylon canvas API to emit a SceneReadyEvent (scene + engine) and accept a shaderLanguage option in RenderConfig so materials/shaders can target WGSL; update Fractal to consume the new SceneReadyEvent signature. Also add i18n entries for the pendulum demo.

src/app/constants/RouterConstants.ts

@@ -8,6 +8,7 @@ import {ConwayGolComponent} from '../pages/algorithms/conway-gol/conway-gol.comp
 import {LabyrinthComponent} from '../pages/algorithms/pathfinding/labyrinth/labyrinth.component';
 import {FractalComponent} from '../pages/algorithms/fractal/fractal.component';
 import {Fractal3dComponent} from '../pages/algorithms/fractal3d/fractal3d.component';
+import {PendulumComponent} from '../pages/algorithms/pendle/pendulum.component';
 
 export class RouterConstants {
 
@@ -65,6 +66,12 @@ export class RouterConstants {
     COMPONENT: Fractal3dComponent
   };
 
+  static readonly PENDULUM = {
+    PATH: 'algorithms/pendulum',
+    LINK: '/algorithms/pendulum',
+    COMPONENT: PendulumComponent
+  };
+
   static readonly IMPRINT = {
     PATH: 'imprint',
     LINK: '/imprint',