Added better security for character loading, worked on zone joining and moving logic

src/app/repositories/CharacterRepository.ts

@@ -16,6 +16,20 @@ class CharacterRepository {
         }
     }
 
+    async getByUserAndId(userId: number, characterId: number): Promise<Character | null> {
+        try {
+            return await prisma.character.findFirst({
+                where: {
+                    userId,
+                    id: characterId,
+                },
+            });
+        } catch (error: any) {
+            // Handle error
+            throw new Error(`Failed to get character by user ID and character ID: ${error.message}`);
+        }
+    }
+
     async getById(id: number): Promise<Character | null> {
         try {
             return await prisma.character.findUnique({