Introduce basic cli command and help menu

[Rjected]

Right now the alphanet binary just runs the node, with no help options, options for overriding the discovery port, etc:

dan@Dans-MacBook-Pro-4 ~/p/alphanet (main) [101]> ./target/debug/alphanet --help
2024-03-21T19:55:55.396789Z  INFO Configuration loaded path="/var/folders/65/m26_cf0d1lbdnp4dvzztr0th0000gn/T/reth-test-MouAvtXj/reth.toml"
2024-03-21T19:55:55.397075Z  INFO Database opened
2024-03-21T19:55:55.413599Z  INFO Pre-merge hard forks (block based):
- Frontier                         @0
- Homestead                        @0
- Tangerine                        @0
- SpuriousDragon                   @0
- Byzantium                        @0
- Constantinople                   @0
- Petersburg                       @0
- Istanbul                         @0
- Berlin                           @0
- London                           @0
Merge hard forks:
- Paris                            @0 (network is not known to be merged)

Post-merge hard forks (timestamp based):
- Shanghai                         @0
- Cancun                           @0

2024-03-21T19:55:55.470785Z  INFO Transaction pool initialized
2024-03-21T19:55:55.470874Z  INFO Connecting to P2P network
2024-03-21T19:55:55.474633Z  INFO StaticFileProducer initialized
2024-03-21T19:55:55.475025Z  INFO Pruner initialized prune_config=PruneConfig { block_interval: 5, segments: PruneModes { sender_recovery: None, transaction_lookup: None, receipts: None, account_history: None, storage_history: None, receipts_log_filter: ReceiptsLogPruneConfig({}) } }
2024-03-21T19:55:55.475238Z  INFO Consensus engine initialized
2024-03-21T19:55:55.475336Z  INFO Engine API handler initialized

We should add most of the reth CLI commands, as well as the help menu.

• CLI commands
• Help menu

We should do something similar to how op-reth is built and launched:
https://github.com/paradigmxyz/reth/blob/6eb7397aa2c49c90922691cb0e176d973bbb441a/bin/reth/src/optimism.rs#L26