Increase stalebot count to 60 and create a new 'open a discussion' template

Author: Linda Peng

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+open_a_discussion:
+  - name: Open a discussion
+    url: https://github.com/codebuddies/backend/discussions/new
+    about: Open a new discussion

.github/stale.yml

@@ -1,5 +1,5 @@
 # Number of days of inactivity before an issue becomes stale
-daysUntilStale: 30
+daysUntilStale: 60
 # Number of days of inactivity before a stale issue is closed
 daysUntilClose: 7
 # Issues with these labels will never be considered stale