feat: Add `getNametagPosition` & `getNametagAtPosition` method to `MessageNametagBuffer`

src/messagenametag.ts

@@ -84,6 +84,11 @@ export class MessageNametagBuffer {
     return true;
   }
 
+  getNametagPosition(messageNametag: MessageNametag): number {
+    const index = this.buffer.findIndex((x) => uint8ArrayEquals(x, messageNametag));
+    return index;
+  }
+
   private rotateLeft(k: number): void {
     if (k < 0 || this.buffer.length == 0) {
       return;
@@ -124,6 +129,10 @@ export class MessageNametagBuffer {
       console.debug("The message nametags buffer has no secret set");
     }
   }
+
+  getNametagAtPosition(position: number): MessageNametag {
+    return this.buffer[position];
+  }
 }
 
 /**