Update Contract Import Syntax to the new Standard

[joshuahannan]

Issue To Be Solved

We have a new standard for contract imports: https://github.com/onflow/flow/blob/master/flips/2022-03-23-contract-imports-syntax.md

Suggest A Solution

• Add flow.json
• Update the contract files to use this syntax for imports
• Update the transactions and scripts as well
• Update the templates package to use these imports as replacements instead.
• Can use what was used in the NFT repo as a starting point: https://github.com/onflow/flow-nft/blob/master/lib/go/templates/templates.go
• Also update to latest Secure Cadence Version