Add issue template

Author: RehanSaeed

Schema.NET.sln

@@ -24,6 +24,7 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Documentation", "Documentation", "{7EDFA103-DB69-4C88-9DE4-97ADBF8253A1}"
 	ProjectSection(SolutionItems) = preProject
 		CONTRIBUTING.md = CONTRIBUTING.md
+		ISSUE_TEMPLATE.md = ISSUE_TEMPLATE.md
 		LICENSE = LICENSE
 		README.md = README.md
 	EndProjectSection