fix: lock profile manager while changing state

Dalamud/Utility/ScopedSyncRoot.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Threading;
+
+namespace Dalamud.Utility;
+
+/// <summary>
+/// Scope for plugin list locks.
+/// </summary>
+public class ScopedSyncRoot : IDisposable
+{
+    private readonly object lockObj;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ScopedSyncRoot"/> class.
+    /// </summary>
+    /// <param name="lockObj">The object to lock.</param>
+    public ScopedSyncRoot(object lockObj)
+    {
+        this.lockObj = lockObj;
+        Monitor.Enter(lockObj);
+    }
+
+    /// <inheritdoc/>
+    public void Dispose()
+    {
+        GC.SuppressFinalize(this);
+        Monitor.Exit(this.lockObj);
+    }
+}