feat: factory updates & refactoring

This commit introduces significant updates to the device factory system, enhancing the way devices are created and managed within the PepperDash Essentials framework.
The changes include:
- New attributes for device configuration and description.
- Refactoring of the device manager and essentials device classes to support new factory methods.
- modified factory classes for essentials devices, plugin development devices, and processor extension devices.
- The device factory interface has been updated to include a factory method for creating devices.
- Added a wrapper for the device factory to streamline device creation.
- Updated plugin loader to accommodate the new device factory structure.

Fixes #1065
Fixed #1277

src/PepperDash.Essentials.Core/Devices/ConfigSnippetAttribute.cs

@@ -0,0 +1,33 @@
+using System;
+
+namespace PepperDash.Essentials.Core
+{
+  /// <summary>
+  /// Represents a ConfigSnippetAttribute
+  /// </summary>
+  [AttributeUsage(AttributeTargets.Class, Inherited = true, AllowMultiple = true)]
+  public class ConfigSnippetAttribute : Attribute
+  {
+    private string _ConfigSnippet;
+
+    /// <summary>
+    /// Represents a configuration snippet for the device.
+    /// </summary>
+    /// <param name="configSnippet"></param>
+    public ConfigSnippetAttribute(string configSnippet)
+    {
+      //Debug.LogMessage(LogEventLevel.Verbose, "Setting Config Snippet {0}", configSnippet);
+      _ConfigSnippet = configSnippet;
+    }
+
+    /// <summary>
+    /// Gets the configuration snippet for the device.
+    /// This snippet can be used in the DeviceConfig to instantiate the device.
+    /// </summary>
+    public string ConfigSnippet
+    {
+      get { return _ConfigSnippet; }
+    }
+  }
+
+}