[skip ci] add github issue template

.github/issue_template.md

@@ -0,0 +1,22 @@
+Please answer these questions before submitting your issue. Thanks!
+
+### What version of Cassandra are you using?
+
+### What did you do?
+
+
+### What did you expect to see?
+
+
+### What did you see instead?
+
+---
+
+If you are having connectivy related issues please share the following additional information
+
+### Describe your Cassandra cluster
+please provide the following information
+
+- output of `nodetool status`
+- output of `SELECT peer, rpc_address FROM system.peers`
+- rebuild your application with the `gocql_debug` tag and post the output