Add plugin methods for changed themes, settings showing message boxes and logging

src/DesktopMagicPluginAPI/LogLevel.cs

@@ -0,0 +1,22 @@
+namespace DesktopMagic.Api;
+
+/// <summary>
+/// Specifies the severity level of a log message.
+/// </summary>
+public enum LogLevel
+{
+    /// <summary>
+    /// Informational message for general information.
+    /// </summary>
+    Info,
+
+    /// <summary>
+    /// Warning message indicating a potential issue.
+    /// </summary>
+    Warning,
+
+    /// <summary>
+    /// Error message indicating a failure or critical issue.
+    /// </summary>
+    Error
+}