Re-enable NFTStorefront in emulator

[SupunS]

Instructions

Issue To Be Solved

In PR https://github.com/onflow/flow-emulator/pull/536, the NFTStorefront was excluded from the emulator since that contract was not migrated to Cadence 1.0 (stable-cadence) at the time.

(Optional): Suggest A Solution

Re-enable/include the contract in the emulator, once the NFTStorefront and NFTStorefrontV2 is migrated to Cadence 1.0.

(Optional): Context

N/A