Introduce Cocktail (Shaker) Sort to the sorting visualizer: implement cocktailSort and a helper switchValuesIfCorrect in the SortingService to generate snapshots for the animation. Add SHAKE_SORT_WIKI URL constant and a UI paragraph (with a link) plus German translation text for the algorithm explanation. Expose the new algorithm in the component (availableAlgorithms and switch handling). Also refactor the component to use Angular's inject() for SortingService and ChangeDetectorRef, tighten some typings (timeoutIds -> number[]), adjust default arraySize, and use const where appropriate.
