Ocean: Initial setup

[Jouzo]

Summary

• Initial Ocean archive setup.
• Adds placeholder FFI calls for indexing/invalidating block
• Adds RocksDB columns families, models and repository for data access

Descritipion

• storage directory holds ain-db Column, TypedColumn and ColumName implementations.
• model directory holds indexed model values and keys.
• repository directory holds implementation of RepositoryOps for bridging column family to the right model.
• Indexer directory holds placeholder for indexing/invalidating block which will be implemented in subsequent PR.

Dependencies

• Depends on ain-dftx: Rust de/serialization of custom messages #2852 and Move RocksDB traits to dedicated package #2853
• Epic PR ref : WIP: Ocean archive and Ocean API  #2724