Console task

[kanej]

Start a node console with the HardhatRuntimeEnvironment initialized and attached to the global scope:

hardhat console
> console.log(hre.config.solidity)
// "0.8.24"

For inspiration consider the HHv2 version of console:

hardhat/packages/hardhat-core/src/builtin-tasks/console.ts

Line 13 in 83721d9

task(TASK_CONSOLE, "Opens a hardhat console")

The v3 version of the run task is likely a good comparison for integration testing.

We should consider accepting a --config parameter to allow specifying a path to an alternative hardhat.config.{js,ts} file.