Add wp-config.php to gitignore, create dist template

- Remove wp-config.php from tracking (contains secrets)
- Add wp-config.php.dist as template for new installs

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -9,8 +9,8 @@
 .env.local
 .env.*.local
 
-# WordPress config with secrets (keep sample)
-# wp-config.php  # Commenting out - we want to track this for snapshots
+# WordPress config with secrets (use wp-config.php.dist as template)
+wp-config.php
 
 # Uploads (too large for git, backup separately)
 wp-content/uploads/