Update Terminal.Gui to 2.0.0-rc.3 and solution config

Switched to Terminal.Gui NuGet package (2.0.0-rc.3) in place of local project reference. Updated GraphicalTools.sln for VS 18, added Solution Items, and set SolutionGuid. Added a local NuGet package source to nuget.config.

Author: tig

Directory.Packages.props

@@ -3,7 +3,7 @@
     <PackageVersion Include="Microsoft.PowerShell.SDK" Version="7.5.4" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.4" />
     <PackageVersion Include="System.Management.Automation" Version="7.5.4" />
-    <PackageVersion Include="Terminal.Gui" Version="2.0.0-beta.217" />
+    <PackageVersion Include="Terminal.Gui" Version="2.0.0-rc.3" />
     <!-- Test dependencies -->
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageVersion Include="xunit" Version="2.9.3" />

GraphicalTools.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
-VisualStudioVersion = 17.0.31903.59
+# Visual Studio Version 18
+VisualStudioVersion = 18.6.11716.218 insiders
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{827E0CD3-B72D-47B6-A68D-7590B98EB39B}"
 EndProject
@@ -17,6 +17,17 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Terminal.Gui", "..\gui-cs\T
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Terminal.Gui.Analyzers.Internal", "..\gui-cs\Terminal.Gui\Terminal.Gui.Analyzers.Internal\Terminal.Gui.Analyzers.Internal.csproj", "{45957E57-3576-4EE7-AE19-4AEEA3347007}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{BC49DFD5-E542-49BF-B582-41A89281D7E0}"
+	ProjectSection(SolutionItems) = preProject
+		ConsoleGuiTools.build.ps1 = ConsoleGuiTools.build.ps1
+		ConsoleGuiTools.Common.props = ConsoleGuiTools.Common.props
+		Directory.Build.props = Directory.Build.props
+		Directory.Packages.props = Directory.Packages.props
+		global.json = global.json
+		nuget.config = nuget.config
+		README.md = README.md
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -96,4 +107,7 @@ Global
 		{233472F8-D472-4265-813B-B394013A2B60} = {827E0CD3-B72D-47B6-A68D-7590B98EB39B}
 		{F1E2D3C4-B5A6-7890-ABCD-EF0987654321} = {A1B2C3D4-E5F6-7890-ABCD-EF1234567890}
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {2FE0632F-98BB-4772-8465-957821A4EE1B}
+	EndGlobalSection
 EndGlobal

nuget.config

@@ -1,9 +1,10 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <clear />
     <add key="PowerShellCore_PublicPackages" value="https://pkgs.dev.azure.com/powershell/PowerShell/_packaging/powershell/nuget/v3/index.json" />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
+    <add key="local" value="C:\Users\Tig/psrepo" />
   </packageSources>
   <packageSourceMapping>
     <packageSource key="nuget.org">

src/Microsoft.PowerShell.ConsoleGuiTools/Microsoft.PowerShell.ConsoleGuiTools.csproj

@@ -13,14 +13,16 @@
         - Add ';https://api.nuget.org/v3/index.json' to the end of the RestoreSources property group below
         - Uncomment the RestoreSources property group below
         -->
-         <RestoreSources>$(RestoreSources);../../../gui-cs/Terminal.Gui/Terminal.Gui/bin/Debug;https://api.nuget.org/v3/index.json;</RestoreSources>
+         <!--<RestoreSources>$(RestoreSources);../../../gui-cs/Terminal.Gui/Terminal.Gui/bin/Debug;https://api.nuget.org/v3/index.json;</RestoreSources>-->
     </PropertyGroup>
 
     <ItemGroup>
         <PackageReference Include="Microsoft.PowerShell.SDK" />
         <!-- Temporarily using ProjectReference to local Terminal.Gui source instead of NuGet package.
              To revert, replace this ProjectReference with: <PackageReference Include="Terminal.Gui" /> -->
-        <ProjectReference Include="..\..\..\gui-cs\Terminal.Gui\Terminal.Gui\Terminal.Gui.csproj" />
+        <!--<ProjectReference Include="..\..\..\gui-cs\Terminal.Gui\Terminal.Gui\Terminal.Gui.csproj" />-->
+
+        <PackageReference Include="Terminal.Gui" />
     </ItemGroup>
 
     <ItemGroup>