feat(game)!: Add winner display and return to lobby functionality

knockoutwhistweb/app/views/ingame/finishedMatch.scala.html

@@ -0,0 +1,37 @@
+@(user: Option[model.users.User], gamelobby: logic.game.GameLobby)
+
+<main class="lobby-background vh-100" id="lobbybackground">
+    <div class="container d-flex flex-column" style="height: calc(100vh - 1rem);">
+        <div class="row">
+            <div class="col">
+                <div class="p-3 text-center fs-4">Winner: @gamelobby.getLogic.getWinner</div>
+            </div>
+        </div>
+        <div class="row justify-content-center align-items-center flex-grow-1">
+        @if((gamelobby.getUserSession(user.get.id).host)) {
+            <div class="col-12 text-center mb-5">
+                <div class="btn btn-success" onclick="backToLobby('@gamelobby.id')">Return to lobby</div>
+            </div>
+        } else {
+            <div class="col-12 text-center mt-3">
+                <div class="spinner-border mt-1" role="status">
+                    <span class="visually-hidden">Loading...</span>
+                </div>
+            </div>
+        }
+        </div>
+    </div>
+</main>
+<script>
+        function waitForFunction(name, checkInterval = 100) {
+            return new Promise(resolve => {
+                const timer = setInterval(() => {
+                    if (typeof window[name] === "function") {
+                        clearInterval(timer);
+                        resolve(window[name]);
+                    }
+                }, checkInterval);
+            });
+        }
+        waitForFunction("pollForUpdates").then(fn => fn('@gamelobby.id'));
+</script>