[FEATURE] [FlowCapability] Lookup another table

[badmonster0]

What is the use case? Lookup another table in cocoindex flow. The table can be either of

• Imported from a data source
• A table created by cocoindex's indexing flow

Describe the solution you'd like A clear and concise description of what you want to happen.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

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