Add GH issue template to redirect ppl to rescript-vscode

Author: fhammerschmidt

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: 💻 rescript-vscode
+    url: https://github.com/rescript-lang/rescript-vscode/issues/new
+    about: Reanalyze is being developed in the rescript-vscode repo. Please open your issue there.