feat(cheats): support arrays + rename read + resolve env vars

[0xrusowsky]

Motivation

• Extends the newly created fork cheatcodes that load variables from foundry.toml, so that they also support arrays.
• Renames the cheatcodes so that they start with readFork to be more idiomatic.
• Adds env var resolving in all fields of the fork config

refs:

• Native Multichain Scripting Workflow #11078
• feat(cheats): setup config env vars #11236

example usage:

[forks]

[forks.mainnet]
rpc_endpoint = "${MAINNET_RPC_URL}" # resolves the env var

[forks.mainnet.vars]
bool_array = [true, false, true]
int_array = [-100, 200, -300]
uint_array = [100, 200, 300]
addr_array = [
    "0x1111111111111111111111111111111111111111",
    "0x2222222222222222222222222222222222222222"
]
bytes32_array = [
    "0x1111111111111111111111111111111111111111111111111111111111111111",
    "0x2222222222222222222222222222222222222222222222222222222222222222"
]
bytes_array = ["0x1234", "0x5678", "0xabcd"]
string_array = ["hello", "world", "test"]

PR Checklist

• Added Tests
• Added Documentation
• Breaking changes

[mattsse]

I'd like to prefix all of these with read or parse, read is prob better,

so that these can be mistaken for the exxisting actual fork related cheatcodes

stale

[DaniPopes]

pls use the let Self {...} = self syntax to not miss arguments

[grandizzy]

lgtm!