feat: Scan devPlugins from any location

Dalamud/Configuration/Internal/DalamudConfiguration.cs

@@ -92,6 +92,13 @@ namespace Dalamud.Configuration.Internal
         /// </summary>
         public Dictionary<string, DevPluginSettings> DevPluginSettings { get; set; } = new();
 
+        /// <summary>
+        /// Gets or sets a list of additional locations that dev plugins should be loaded from. This can
+        /// be either a DLL or folder, but should be the absolute path, or a path relative to the currently
+        /// injected Dalamud instance.
+        /// </summary>
+        public List<DevPluginLocationSettings> DevPluginLoadLocations { get; set; } = new();
+
         /// <summary>
         /// Gets or sets the global UI scale.
         /// </summary>

Dalamud/Configuration/Internal/DevPluginLocationSettings.cs

@@ -0,0 +1,24 @@
+namespace Dalamud.Configuration
+{
+    /// <summary>
+    /// Additional locations to load dev plugins from.
+    /// </summary>
+    internal sealed class DevPluginLocationSettings
+    {
+        /// <summary>
+        /// Gets or sets the dev pluign path.
+        /// </summary>
+        public string Path { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether the third party repo is enabled.
+        /// </summary>
+        public bool IsEnabled { get; set; }
+
+        /// <summary>
+        /// Clone this object.
+        /// </summary>
+        /// <returns>A shallow copy of this object.</returns>
+        public DevPluginLocationSettings Clone() => this.MemberwiseClone() as DevPluginLocationSettings;
+    }
+}