fix neutral killing issues and rename some properties in ICustomRole to clear confusion

MiraAPI.Example/Roles/NeutralKillerRole.cs

@@ -0,0 +1,27 @@
+using MiraAPI.Roles;
+using UnityEngine;
+
+namespace MiraAPI.Example.Roles;
+
+[RegisterCustomRole]
+public class NeutralKillerRole : ImpostorRole, ICustomRole
+{
+    public string RoleName => "Neutral Killer";
+    public string RoleDescription => "Neutral who can kill.";
+    public string RoleLongDescription => RoleDescription;
+    public Color RoleColor => Color.magenta;
+    public ModdedRoleTeams Team => ModdedRoleTeams.Neutral;
+    public bool CanUseKill => true;
+    public bool CanGetKilled => true;
+    public bool CanUseVent => true;
+
+    public override void SpawnTaskHeader(PlayerControl playerControl)
+    {
+        // remove existing task header.
+    }
+
+    public override bool DidWin(GameOverReason gameOverReason)
+    {
+        return GameManager.Instance.DidHumansWin(gameOverReason);
+    }
+}