Finalizer Component (Granite) for Filecoin

[ranchalp]

Description: The Finalizer Component (FC) brings fast finality to Filecoin via a dedicated component that executes a BFT consensus protocol (Granite) to finalize Filecoin tipsets.

ETA: 2024-03-31 Maintainer: @ranchalp

### Milestones
- [ ] Get community-wide agreement on requirements and assumptions (censorship resistance, adversary, latency, safety, liveness, network, resistance to eclipse attacks). Core devs, CL and CNL should be part of this discussion at least.
- [ ] Settle on design given community-wide agreement on requirements and assumptions
- [ ] Prototyping and testing to select system parameters
- [ ] Auditing and calibration testnet
- [ ] Mainnet release

Known dependencies:

• None (but other projects should depend on this).