Create stale.yml (to reduce older open issues)

.github/stale.yml

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+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 120
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - pinned
+  - keep
+  - enhancement
+  - confirmed
+# Label to use when marking an issue as stale
+staleLabel: stale
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  Hey! This issue has been open for quite some time without any new comments now.
+  It will be closed automatically in a week if no further activity occurs.
+  
+  Thank you for using WLED!
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: false