Version 7

[harmony7]

This PR includes many many updates that have been made over the last few weeks.

The main updates:

• All assets are stored in the KV Store - we have dropped the feature of inlining asset bytes into the Wasm.
• Management commands have been organized using git-style subcommands:

  publish-content
  clean
  collections list
  collections delete
  collections update-expiration
  collections promote
  

• All the management commands can be run using the --local flag to operate on the disk files used for local development.
• Named collections - sets of assets that are managed together and can be individually previewed.
• Expiration - collections can be set to have an expiration timestamp so they automatically expire.
• Collection selector utilities that can be run at the edge code to activate a collection.
• We have dropped the feature of moduleAssets - no replacement, as this can be done trivially using await import()