docs: Create config.yml to add links on issue creation

Author: foxcpp

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,7 @@
+contact_links:
+  - name: Questions 
+    url: "https://github.com/foxcpp/maddy/discussions/new?category=q-a"
+    description: "Use GitHub discussions for any questions"
+  - name: IRC channel
+    url: "https://webchat.freenode.net/#maddy"
+    description: "... or there is also an IRC channel for any discussions"