Add copy-paste template to reviewer sources config

Includes a commented-out source entry with all fields (including
except) that users can copy, uncomment, and fill in.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jcasimir

plugins/compound-engineering/skills/refresh/sync-reviewers.sh

@@ -26,15 +26,17 @@ if [ ! -f "$USER_CONFIG" ]; then
 # Configure which repos to pull reviewer personas from.
 # Run /ce:refresh to sync reviewers after editing this file.
 #
-# Fields:
-#   name   - Label for this source
-#   repo   - GitHub owner/repo
-#   branch - Branch to fetch from (default: main)
-#   path   - Directory containing .md files (default: .)
-#   except - List of reviewer filenames (without .md) to skip
-#
 # Sources listed first have higher priority. If two sources have
 # a file with the same name, the first source's version is kept.
+#
+# To add a source, copy this template and uncomment it:
+#
+#  - name: my-reviewers
+#    repo: owner/repo-name
+#    branch: main
+#    path: .
+#    except:
+#      - reviewer-to-skip
 
 YAML
   # Append the sources from the default registry