Proxy `nile node` unknown options to `starknet-devnet`

[ericnordelo]

Fixes #293

This PR proposes to make available to the nile node interface all the options that straknet-devnet accepts by default.

This enables forking, but also the ability to specify the initial balances, the number of predeployed accounts, the gas price to be used, the account class to be used, etc...

Ex:

nile node --fork-network alpha-mainnet --fork-block 4 --gas-price 1234

Previous lite mode flag was labeled --lite_mode, and now it must be named --lite-mode, so this is a small breaking change.