Remove content directories from git tracking

Content and scheduled post directories will be managed separately
as Docker volume mounts for easier content management.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -48,4 +48,8 @@ logs/
 .cache/
 
 # Development scripts
-dev-start.sh.bak
+dev-start.sh.bak
+
+# Content directories (managed separately)
+content/
+scheduled/