Post-Crescendo updates

[sisyphusSmiling]

Closes: #165 #171

Description

• Replaces existing node modules dependency system with Flow CLI's dependency manager for consistency with other onflow repos
• Updates CI commands to use the Flow CLI flow command found in v2.0.0
• Removes Previewnet deployment addresses as that network will be deprecated
• Removes the code normalization script which has been integrated with the flow test command
• Removes the outdated .gitmodules file, a remnant from when this repo used git submodules

Also, outside of the context of this PR, the new NFTCollectionFactory and FTVaultFactory (#164) contracts have been deployed on Testnet & Mainnet. After deployment, the existing hosted factory managers (see README) have been configured with the setup transactions already found in this repo.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.48%. Comparing base (3a09212) to head (6830315).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #172   +/-   ##
=======================================
  Coverage   91.48%   91.48%           
=======================================
  Files           4        4           
  Lines         364      364           
=======================================
  Hits          333      333           
  Misses         31       31           

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