refactor(sequencer, storage): move rocksdb communication to StorageActor

[Arjentix]

🎯 Purpose

This is a big refactor of our storage. This PR reimplements rocksdb communication from scratch and moves it to StorageActor. Also some protocol types where rethinked.

⚙️ Approach

• Added actor feature to actor crates which helps dependent actors not to build extra actor and it's dependencies when they need just trait and protocol
• Transaction index is moved from SequencerCore to StorageActor
• Rocksdb communication is split into different parts:
  • db.rs: agnostic wrapper around rocksdb crate
  • entities.rs: encoding entities (ex. cells)
  • encoding.rs: encoding utilities
  • actor.rs: high-level management of db
• Some protocol types for StorageActor where refactored and cleaned
• Completely removed storage/src/sequencer/ module
• All tests were ported and added new ones

🧪 How to Test

cargo nextest run --all-features -p sequencer_storage_actor

🔗 Dependencies

None

🔜 Future Work

• Decide what we do with Indexer
• And then refactor indexer part of storage crate
• After that remove storage crate entirely

📋 PR Completion Checklist

• Complete PR description
• Implement the core functionality
• Add/update tests
• Add/update documentation and inline comments