chore: update issues config

Author: Salakar

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,11 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Feature Request
+    url: https://github.com/invertase/react-native-firebase/discussions/new
+    about: Share ideas for new features.
+  - name: Ask a Question
+    url: https://github.com/invertase/react-native-firebase/discussions/new
+    about: Ask the community for help.
+  - name: Show and tell
+    url: https://github.com/invertase/react-native-firebase/discussions/4106
+    about: Showcase what you've built with React Native Firebase.