Update issue template to point directly at discussions

- Add a config.yml file with contact_links section that points directly to our discussion forum
- Remove the ask-help section
- Update the Bug report template to ask for a Include a minimal reproducible example: https://stackoverflow.com/help/minimal-reproducible-example

.github/ISSUE_TEMPLATE/bug-report.md

@@ -11,7 +11,8 @@ about: Let us know if something is broken on Mesa
 <!-- A clear and concise description of what you expected to happen -->
 
 **To Reproduce**
-<!-- Steps to reproduce the bug, or a link to a project where the bug is visible -->
+<!-- Steps to reproduce the bug, or a link to a project where the bug is visible
+Include a Minimal reproducible example: https://stackoverflow.com/help/minimal-reproducible-example -->
 
 **Additional context**
 <!--

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: true
+contact_links:
+  - name: Questions, ideas, showcases and more
+    url: https://github.com/projectmesa/mesa/discussions
+    about: Discuss Mesa, ask questions, share ideas, and showcase your projects