Deneb: Add BeaconState

During the Deneb fork, some fields were added to the `ExecutionPayloadHeader`.
The `ExecutionPayloadHeader` is part of the `BeaconState`.

==> This change should be reflected in the `BeaconState`.

specs/deneb/beacon-chain.md

@@ -20,6 +20,7 @@
     - [`BeaconBlockBody`](#beaconblockbody)
     - [`ExecutionPayload`](#executionpayload)
     - [`ExecutionPayloadHeader`](#executionpayloadheader)
+    - [`BeaconState`](#beaconstate)
 - [Helper functions](#helper-functions)
   - [Misc](#misc)
     - [`kzg_commitment_to_versioned_hash`](#kzg_commitment_to_versioned_hash)
@@ -171,6 +172,53 @@ class ExecutionPayloadHeader(Container):
     excess_blob_gas: uint64  # [New in Deneb:EIP4844]
 ```
 
+#### `BeaconState`
+
+```python
+class BeaconState(Container):
+    # Versioning
+    genesis_time: uint64
+    genesis_validators_root: Root
+    slot: Slot
+    fork: Fork
+    # History
+    latest_block_header: BeaconBlockHeader
+    block_roots: Vector[Root, SLOTS_PER_HISTORICAL_ROOT]
+    state_roots: Vector[Root, SLOTS_PER_HISTORICAL_ROOT]
+    historical_roots: List[Root, HISTORICAL_ROOTS_LIMIT]
+    # Eth1
+    eth1_data: Eth1Data
+    eth1_data_votes: List[Eth1Data, EPOCHS_PER_ETH1_VOTING_PERIOD * SLOTS_PER_EPOCH]
+    eth1_deposit_index: uint64
+    # Registry
+    validators: List[Validator, VALIDATOR_REGISTRY_LIMIT]
+    balances: List[Gwei, VALIDATOR_REGISTRY_LIMIT]
+    # Randomness
+    randao_mixes: Vector[Bytes32, EPOCHS_PER_HISTORICAL_VECTOR]
+    # Slashings
+    slashings: Vector[Gwei, EPOCHS_PER_SLASHINGS_VECTOR]  # Per-epoch sums of slashed effective balances
+    # Participation
+    previous_epoch_participation: List[ParticipationFlags, VALIDATOR_REGISTRY_LIMIT]
+    current_epoch_participation: List[ParticipationFlags, VALIDATOR_REGISTRY_LIMIT]
+    # Finality
+    justification_bits: Bitvector[JUSTIFICATION_BITS_LENGTH]  # Bit set for every recent justified epoch
+    previous_justified_checkpoint: Checkpoint
+    current_justified_checkpoint: Checkpoint
+    finalized_checkpoint: Checkpoint
+    # Inactivity
+    inactivity_scores: List[uint64, VALIDATOR_REGISTRY_LIMIT]
+    # Sync
+    current_sync_committee: SyncCommittee
+    next_sync_committee: SyncCommittee
+    # Execution
+    latest_execution_payload_header: ExecutionPayloadHeader  # [Modified in Deneb:EIP4844]
+    # Withdrawals
+    next_withdrawal_index: WithdrawalIndex
+    next_withdrawal_validator_index: ValidatorIndex
+    # Deep history valid from Capella onwards
+    historical_summaries: List[HistoricalSummary, HISTORICAL_ROOTS_LIMIT]
+```
+
 ## Helper functions
 
 ### Misc