feat: addresses on the Platform chain

[QuantumExplorer]

This PR is made to merge the main bulk of the work into a branch holding the work of multiple contributors.

[github-actions]

❌ gRPC Query Coverage Report

================================================================================
gRPC Query Coverage Report - NEW QUERIES ONLY
================================================================================

Total queries in proto: 49
Previously known queries: 47
New queries found: 2

================================================================================

New Query Implementation Status:
--------------------------------------------------------------------------------
✗ getAddressInfo                                NOT FOUND
✗ getAddressesInfos                             NOT FOUND

================================================================================
Summary:
--------------------------------------------------------------------------------
New queries implemented: 0 (0.0%)
New queries missing: 2 (100.0%)

Total known queries: 49
  - Implemented: 44
  - Not implemented: 4
  - Excluded: 1

Not implemented queries:
  - getAddressInfo
  - getAddressesInfos
  - getConsensusParams
  - getTokenPreProgrammedDistributions

Missing NEW queries:
  - getAddressInfo
  - getAddressesInfos

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/singleUseKeys

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[lklimek]

maybe we should move sign_create_witness() out of signer, into new trait