CmdPal: Removing Core projects (#45693)

Functionally, no differences.

- Removed Core projects.
- Core.Common => Microsoft.CmdPal.Common
- Core.ViewModels => Microsoft.CmdPal.UI.ViewModels

---------

Co-authored-by: Jiří Polášek <me@jiripolasek.com>

src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/ProgressViewModel.cs

@@ -0,0 +1,70 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.CmdPal.UI.ViewModels.Models;
+using Microsoft.CommandPalette.Extensions;
+
+namespace Microsoft.CmdPal.UI.ViewModels;
+
+public partial class ProgressViewModel : ExtensionObjectViewModel
+{
+    public ExtensionObject<IProgressState> Model { get; }
+
+    public bool IsIndeterminate { get; private set; }
+
+    public uint ProgressPercent { get; private set; }
+
+    public ProgressViewModel(IProgressState progress, WeakReference<IPageContext> context)
+        : base(context)
+    {
+        Model = new(progress);
+    }
+
+    public override void InitializeProperties()
+    {
+        var model = Model.Unsafe;
+        if (model is null)
+        {
+            return; // throw?
+        }
+
+        IsIndeterminate = model.IsIndeterminate;
+        ProgressPercent = model.ProgressPercent;
+
+        model.PropChanged += Model_PropChanged;
+    }
+
+    private void Model_PropChanged(object sender, IPropChangedEventArgs args)
+    {
+        try
+        {
+            FetchProperty(args.PropertyName);
+        }
+        catch (Exception ex)
+        {
+            ShowException(ex);
+        }
+    }
+
+    protected virtual void FetchProperty(string propertyName)
+    {
+        var model = this.Model.Unsafe;
+        if (model is null)
+        {
+            return; // throw?
+        }
+
+        switch (propertyName)
+        {
+            case nameof(IsIndeterminate):
+                this.IsIndeterminate = model.IsIndeterminate;
+                break;
+            case nameof(ProgressPercent):
+                this.ProgressPercent = model.ProgressPercent;
+                break;
+        }
+
+        UpdateProperty(propertyName);
+    }
+}