Updated plugin installation and plugin loading

DiscordBotCore.PluginManagement/Models/InstallationProgressIndicator.cs

@@ -1,16 +0,0 @@
-namespace DiscordBotCore.PluginManagement.Models;
-
-public class InstallationProgressIndicator
-{
-    private readonly Dictionary<string, float> _DownloadProgress;
-    
-    public InstallationProgressIndicator()
-    {
-        _DownloadProgress = new Dictionary<string, float>();
-    }
-    
-    public void SetProgress(string fileName, float progress)
-    {
-        _DownloadProgress[fileName] = progress;
-    }
-}