added dialogue manager and radar

Assets/Scripts/DialogueLine.cs

@@ -0,0 +1,17 @@
+using System;
+using UnityEngine;
+
+/// <summary>
+/// One "page" of dialogue: a speaker name + an array of text lines.
+/// Fill these out in the Inspector on a DialogueNPC component.
+/// </summary>
+[Serializable]
+public class DialogueLine
+{
+    [Tooltip("Name shown above the text box. Leave blank to hide the name bar.")]
+    public string speakerName = "???";
+
+    [Tooltip("Each entry is one page of dialogue. Press E to advance.")]
+    [TextArea(2, 6)]
+    public string[] pages = { "..." };
+}