feat: fusaka support

[ypatil12]

Motivation:

The upcoming Fusaka hard fork (Fulu for consensus layer) introduces the following consensus EIPs:

• EIP-7594: PeerDAS - Peer Data Availability Sampling
• EIP-7917: Deterministic proposer lookahead
• EIP-7892: Blob Parameter Only Hardforks

As a result of the above, the only consensus spec container change is the BeaconState extending by 1 field to a size of 37. The height of the tree is still 6 (supports up to 64 parameters). Thus, we do not need any modifications to EigenPods on-chain.

The only modification we need to make is to update the proof generation library to support Fulu proofs. Much of the heavy lifting for this PR was already done by adding versioned beacon chain support for Pectra.

Modifications:

• Update attestantio lib
• Create a Fulu beacon state type
• Create a ComputeBeaconStateTopLevelRootsFulu for Fulu
• Update all versionedBeaconState swich/if statements to account for Fulu
• Update ReadME for future 1.6.0 release

Result:

Fusaka ready proof-gen

[ypatil12]

Pending tests, will download Fulu state once Holesky has a hard fork

Edit: Will update tests in a separate PR, below tx's are sufficient

[ypatil12]

Start Checkpoint: https://holesky.etherscan.io/tx/0xfad239a9bd156929fbecf0ecf78a85437f0b7726c62ecb753fe83a8a1198dd44
Verify Checkpoint: https://holesky.etherscan.io/tx/0x9b934da80c826561880e4357802328f381d1ffb96fa626fa1c0109d983690fdf