Update documentation: Replace Qdrant with Supabase references

- Updated vector store provider references throughout documentation
- Changed default vector store from Qdrant to Supabase (pgvector)
- Updated configuration examples to use Supabase connection strings
- Modified navigation structure to remove qdrant-specific references
- Updated examples in mem0-with-ollama and llama-index integration
- Corrected API reference and architecture documentation

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

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

docs/mint.json

@@ -72,7 +72,6 @@
       "group": "Database Integration",
       "pages": [
         "database/neo4j",
-        "database/qdrant",
         "database/supabase"
       ]
     },