Enable Decap CMS editorial workflow and preview pane

- Added publish_mode: editorial_workflow for draft/review/publish workflow
- Enabled preview pane (changed from false to true) for better markdown editing
- Meg and Holly can now save drafts without immediate publish
- Preview lets editors see formatted content while editing

Benefits:
- Drafts saved as Git branches (safety net)
- 'Ready for Review' workflow available
- 'Publish' merges to master branch
- Full audit trail of all changes
- Split-screen markdown preview improves UX

admin/config.yml

@@ -14,9 +14,12 @@ site_url: https://firefrostgaming.com
 display_url: https://firefrostgaming.com
 logo_url: /assets/images/2026/02/Light-logo.png
 
-# Disable preview pane globally (dark mode compatibility)
+# Editorial workflow - draft/review/publish flow
+publish_mode: editorial_workflow
+
+# Enable preview pane for better editing experience
 editor:
-  preview: false
+  preview: true
 
 # Media library points to branding assets
 media_folder: "docs/branding"