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/IconDataViewModel.cs

@@ -0,0 +1,67 @@
+// 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 CommunityToolkit.Mvvm.ComponentModel;
+using Microsoft.CmdPal.UI.ViewModels.Models;
+using Microsoft.CommandPalette.Extensions;
+using Microsoft.CommandPalette.Extensions.Toolkit;
+using Windows.Storage.Streams;
+
+namespace Microsoft.CmdPal.UI.ViewModels;
+
+public partial class IconDataViewModel : ObservableObject, IIconData
+{
+    private readonly ExtensionObject<IIconData> _model = new(null);
+
+    // If the extension previously gave us a Data, then died, the data will
+    // throw if we actually try to read it, but the pointer itself won't be
+    // null, so this is relatively safe.
+    public bool HasIcon => !string.IsNullOrEmpty(Icon) || Data.Unsafe is not null;
+
+    // Locally cached properties from IIconData.
+    public string Icon { get; private set; } = string.Empty;
+
+    // Streams are not trivially copy-able, so we can't copy the data locally
+    // first. Hence why we're sticking this into an ExtensionObject
+    public ExtensionObject<IRandomAccessStreamReference> Data { get; private set; } = new(null);
+
+    IRandomAccessStreamReference? IIconData.Data => Data.Unsafe;
+
+    public string? FontFamily { get; private set; }
+
+    public IconDataViewModel(IIconData? icon)
+    {
+        _model = new(icon);
+    }
+
+    // Unsafe, needs to be called on BG thread
+    public void InitializeProperties()
+    {
+        var model = _model.Unsafe;
+        if (model is null)
+        {
+            return;
+        }
+
+        Icon = model.Icon;
+        Data = new(model.Data);
+
+        if (model is IExtendedAttributesProvider icon2)
+        {
+            var props = icon2.GetProperties();
+
+            // From Raymond Chen:
+            // Make sure you don't try do do something like
+            //    icon2.GetProperties().TryGetValue("awesomeKey", out var awesomeValue);
+            //    icon2.GetProperties().TryGetValue("slackerKey", out var slackerValue);
+            // because each call to GetProperties() is a cross process hop, and if you
+            // marshal-by-value the property set, then you don't want to throw it away and
+            // re-marshal it for every property. MAKE SURE YOU CACHE IT.
+            if (props?.TryGetValue(WellKnownExtensionAttributes.FontFamily, out var family) ?? false)
+            {
+                FontFamily = family as string;
+            }
+        }
+    }
+}