Fix issue templates (microsoft#1464)

Author: mairaw

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,38 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Issue with .NET Framework
+    url:  https://developercommunity.visualstudio.com/dotnet
+    about: Please open issues relating to the .NET Framework (rather than .NET Core or .NET 5+) in Developer Community
+  - name: Issue with ASP.NET Core
+    url:  https://github.com/dotnet/aspnetcore/issues/new/choose
+    about: Please open issues relating to ASP.NET Core in dotnet/aspnetcore.
+  - name: Issue with .NET runtime or core .NET libraries
+    url:  https://github.com/dotnet/runtime/issues/new/choose
+    about: Please open issues with the .NET runtime or core .NET libraries in dotnet/runtime.
+  - name: Issue with .NET SDK
+    url:  https://github.com/dotnet/sdk/issues/new/choose
+    about: Please open issues relating to the .NET SDK in dotnet/sdk.
+  - name: Issue with .NET Aspire
+    url:  https://github.com/dotnet/aspire/issues/new/choose
+    about: Please open issues relating to .NET Aspire in dotnet/aspire.
+  - name: Issue with Entity Framework
+    url:  https://github.com/dotnet/efcore/issues/new/choose
+    about: Please open issues relating to Entity Framework in dotnet/efcore.
+  - name: Issue with .NET MAUI
+    url:  https://github.com/dotnet/maui/issues/new/choose
+    about: Please open issues relating to .NET MAUI in dotnet/maui.    
+  - name: Issue with Roslyn compiler
+    url:  https://github.com/dotnet/roslyn/issues/new/choose
+    about: Please open issues relating to the Roslyn .NET compiler in dotnet/roslyn.
+  - name: Issue with Windows Forms
+    url:  https://github.com/dotnet/winforms/issues/new/choose
+    about: Please open issues relating to Windows Forms in dotnet/winforms.
+  - name: Issue with WPF
+    url:  https://github.com/dotnet/wpf/issues/new/choose
+    about: Please open issues relating to WPF in dotnet/wpf.
+  - name: Issue with release notes or package deprecation
+    url:  https://github.com/dotnet/core/issues/new/choose
+    about: Please open issues relating to release notes in dotnet/core.
+  - name: Issue with .NET website
+    url:  https://github.com/dotnet/website-feedback/issues/new/choose
+    about: Please open issues relating to the website in dotnet/website-feedback.