Add query for new basket fees ORM param

[ryanchristo]

Summary

Following #1349, we need to add a query for basket fees in the same way we have a query for allowed denoms. The basket creation fee is no longer included in the legacy Params struct but rather in a separate ORM table.

Problem Definition

Unable to query for the current set of allowed basket creation fees.

Proposal

Add query for basket fees using query for allowed denoms as an example.

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