Improve reference list generation, Compatibility with cohere embedding models

What’s Changed

• add new references code, query error handling (#29) @spodgorny9
• _add_tag to include metadata in text chunks after db retrieval (#28) @spodgorny9
• Alter get_embedding so that it is compatible with cohere models (#27) @spodgorny9
• Dynamic column retrieval for metadata (#26) @spodgorny9
• Add mapping for ewiz specific model (#25) @spodgorny9