Added omitted files

Author: harishsk

NuGet.config

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <solution>
+    <add key="disableSourceControlIntegration" value="true" />
+  </solution>
+  <packageSources>
+    <clear />
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
+    <add key="dotnet-tools" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json" />
+    <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
+    <add key="vs-buildservices" value="https://pkgs.dev.azure.com/azure-public/vside/_packaging/vs-buildservices/nuget/v3/index.json" />
+    <add key="dotnet-core" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" />
+    <add key="myget-core" value="https://dotnet.myget.org/F/dotnet-core/api/v3/index.json" />
+    <add key="myget-roslyn" value="https://dotnet.myget.org/F/roslyn-analyzers/api/v3/index.json" />
+    <add key="mlnet-daily" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/MachineLearning/nuget/v3/index.json" />
+    <add key="mlnet-testdata" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/machinelearning-testdata/nuget/v3/index.json" />
+    <add key="local-dev" value="..\arcade\artifacts\packages\Debug\NonShipping" />
+  </packageSources>
+  <disabledPackageSources>
+    <clear />
+  </disabledPackageSources>
+</configuration>

global.json

@@ -0,0 +1,12 @@
+{
+  "tools": {
+    "dotnet": "5.0.100-rc.1.20452.10"
+  },
+  "msbuild-sdks": {
+    "Microsoft.DotNet.Arcade.Sdk": "5.0.0-dev",
+    "Microsoft.DotNet.Helix.Sdk": "5.0.0-beta.20461.7",
+    "Microsoft.Build.Traversal": "2.1.1",
+    "Microsoft.SourceLink.GitHub": "1.1.0-beta-20206-02",
+    "Microsoft.SourceLink.Common": "1.1.0-beta-20206-02"
+  }
+}