Add template to ask users to not open issues here

.github/ISSUE_TEMPLATE/forbid-issues.md

@@ -0,0 +1,16 @@
+---
+name: Forbid issues
+about: Tell users about not opening issues here
+title: Do not open issues here
+labels: invalid
+assignees: ''
+
+---
+
+Please, do not open issues in this repository.
+
+If you have a question about IPFS or want discuss something, you can do it at https://discuss.ipfs.io.
+
+If you need help about what is the best place to post your issue, please ask at https://discuss.ipfs.io.
+
+We will close all issues in this repository. The issues tab is only activated to keep old links to old discussions available.