feat: add unsafe-password support to cast wallet import

[misko9]

Adds an --unsafe-password option to the cast wallet import cli.

Motivation

Our test suite uses the foundry docker image to start anvil and then executes cast commands using that docker image. As test cases have been built, we found that it would be beneficial to be able to import an account using cast wallet import, but it requires a password prompt making this difficult in our test environment while other commands such as cast wallet new do not have this limitation.

Solution

An option, --unsafe-password, was added to the cast wallet import command to support bypassing the password prompt by passing the password in the cli. This solution is similar to the cast wallet new command along with other cast commands that use a keystore.

Note: this new option does not currently include a test case. There are no existing test cases for cast wallet import to mirror. I have a test case prepped, but subsequent test runs with it will fail due to the account name's keystore already existing unlike cast wallet new which will have a unique keystore filename on each run.

[Evalir]

pending @mattsse / @klkvr

[klkvr]

lgtm

[Evalir]

ci failure unrelated