Add issue templates to the repo

Author: Jonathan S. Katz

.github/ISSUE_TEMPLATE/issue.md

@@ -0,0 +1,8 @@
+---
+name: Open an Issue for PGO Examples
+about: Open an issue specific to the "postgres-operator-examples" repository. For all other issues please visit https://github.com/CrunchyData/postgres-operator
+---
+
+Please report any bugs or feature requests specific to the PGO Examples that are in this repository. This includes anything around the examples for Kustomize and Helm.
+
+For any bugs or feature request related to PGO itself, please visit https://github.com/CrunchyData/postgres-operator