Investigate potential ChromaDB replacements

[vegu-ai-tools]

chromadb collection management seems clunky and not being able to duplicate a collection makes our save file management more difficult than it needs to be.

• https://github.com/parthsarthi03/raptor - novel retrieval approach
• https://github.com/kagisearch/vectordb - lightweight and agile - not sure it has any additional filtering features
• https://github.com/weaviate/weaviate - lightweight and seems well maintained
• https://github.com/opensearch-project/OpenSearch