Reorganize the repo

[tkporter]

Lots of packages, it's getting unwieldy

Preferably want:

• Sub dir for contracts
• Separate out the tests more explicitly
• Probably leverage cargo workspaces for the rust harness tests, if this is possible
• Try to leverage forc's workspaces too
• See if we can clean up some of the shell scripts we have to be a little less clunky - do we even need them if we have forc workspaces?
• Separate the deployment tooling from contracts

[tkporter]

The indexer work will involve mixing up the repo a little bit so I may end up doing this as a part of the indexing stuff

[tkporter]

Gonna consider this done with #39