Add blog-drafts to gitignore

Blog content is now managed in Sanity CMS rather than markdown files
in the repository.

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Author: mostlyerror

.gitignore

@@ -35,3 +35,6 @@ next-env.d.ts
 
 # Sanity
 /dist
+
+# Blog drafts (content managed in Sanity)
+blog-drafts/