PE-1918: PST composite

[matibat]

Changes

• Ports the safe types: ArweaveAddress, Winston, and TransactionID from CORE into Dart
• Implements a Builder for the contract state
• Implements the ContractReader interface
  • Implements RedstoneContractReader
  • Implements VertoContractReader
  • Implements SmartweaveContractReader
    • which refactors the implementation of web-pst to simply read the contract (removed the TS code that is already ported to Dart)
• Implements the ContractOracle interface class
  • Implements ArDriveContractOracle (the composite class; implements ContractOracle)
• Implements the CommunityOracle interface class
  • which makes use of a ContractOracle (e.i. the composite class) to make high-level computations
• Injects the CommunityOracle to the PSTService

TODO

• Make the weightedRandom method testable

[github-actions]

Visit the preview URL for this PR (updated for commit a8e6865):

https://ardrive-web--pr621-pe-1918-asn7k3fb.web.app

_{(expires Fri, 02 Sep 2022 21:36:03 GMT)}

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[matibat]

* self review checkpoint *

[matibat]

Only missing:

• the implementations of ContractReader and ContractOracle, then the composite, and the CommunityOracle which is the high level class to be used in the codebase;
• integrate web-pst to the ContractOracle composite (only for web);
• start using the high-level class in the codebase

[matibat]

* self review checkpoint *

[thiagocarvalhodev]

Almost finishing! Reviewed all implementations. Just need to review the tests.

[thiagocarvalhodev]

Finished review! Left some comments.

[thiagocarvalhodev]

Just left a small comment about changing the while approach with for. But it's good to go! thanks for addressing all of my comments.

[matibat]

Left one single comment. Imma apply the change and manually test the PR

[jdaev]

Awesome work 👍🏽