chore: Add ISSUE_TEMPLATE config.yml

Author: Christopher-Chianelli

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: true
+contact_links:
+  - name: Question
+    url: https://stackoverflow.com/questions/ask?tags=timefold
+    about: Ask a question about how to use Timefold Solver.
+  - name: Discussions
+    url: https://github.com/TimefoldAI/timefold-solver/discussions/new?category=general
+    about: Open Community discussions related to Timefold Solver.