forc-node: local mode should automatically fund the default account or fund

[kayagokalp]

Currently forc-node local creates a local fuel-core instances that has in-memory db but the user's default account is not funded by default. This would be good and easy addition to forc-node to enable better dev-ex for local developers.

Possible Solutions

1. Read the local forc-wallet account from default path, if that exists, fund the first account (0th index).
2. Ask the user if they want to fund a specific account

We can implement one of the options or make them work together and by default we fund the default account if a flag/param exists we can proceed to fund that one too.