Merge branch 'Ariana' into 'main'

possibility: draw

See merge request pmuw_projekt/pmuw_projekt_notebinder!19

src/main/c/GameTic_Tac_Toe/game.c

@@ -76,3 +76,9 @@ int main() {
             printf("Spieler %c gewinnt!\n", winner);
             break;
         }
+
+        if (isBoardFull()) {
+            displayBoard();
+            printf("Unentschieden!\n");
+            break;
+        }