feat: getting access to DA's consensus state

[Farhad-Shabani]

Closes: #7

Description

• Ended up introducing the sov-consensus-state-tracker module, a custom kernel that enables the extraction of specific ConsensusState relevant fields from the DA's header.
• This module is generic across different DAs and offers extensibility through the implementation of the HasConsensusState trait for each targeted DA (Of course at the cost of some complexity).
• When integrating with the rollup's starter, each implementation can be individually enabled using feature flags.
• In addition, when integrating IBC with the starter, the sov-consensus-state-tracker should be utilized to import all objects relevant to a particular DA, so as not to have to deal with the Rust orphan rule in the starter.

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PR author checklist

• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).