Update sim game route

Update the route for the Game of Sim to `/sim` so that the provided URL leads to the game.

src/App.tsx

@@ -81,6 +81,7 @@ const App = () => (
           <Route path="/themes/advanced-algorithms" element={<AdvancedAlgorithms />} />
           <Route path="/themes/data-structures" element={<DataStructures />} />
           <Route path="/themes/games" element={<Games />} />
+          <Route path="/themes/games/sim" element={<GameOfSimPage />} />
           <Route path="/themes/cards-math" element={<CardsMath />} />
           <Route path="/themes/puzzles" element={<Puzzles />} />
           <Route path="/themes/miscellany" element={<Miscellany />} />

src/components/GameOfSim.tsx

@@ -277,7 +277,7 @@ const GameOfSim: React.FC<GameOfSimProps> = ({ showSocialShare = true }) => {
               <SocialShare 
                 title="Game of Sim"
                 description="Play the strategic Game of Sim! Take turns coloring edges between vertices while avoiding creating triangles of your own color."
-                url={`${window.location.origin}/themes/games#game-of-sim`}
+                url={`${window.location.origin}/themes/games/sim`}
               />
             </div>
           )}