chore: keep .superset out of the repository

It is local workspace configuration for a tool, not part of the project.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitignore

@@ -46,3 +46,6 @@ Thumbs.db
 *.json.gz
 *.xml.gz
 *.zip.gz
+
+# Configuração local do Superset
+.superset/