feat: implement --confDir flag and add integration tests

[p4rthh]

The --confDir flag was present in the interface but marked as (TODO) in the help menu and lacked test coverage.

This PR:

• Enables the --confDir argument in the CLI.
• Updates the help menu to remove the (TODO) tag.
• Adds an integration test (src/test/confDir.spec.ts) to verify that the CLI correctly loads config.ini from a custom directory.

Testing

Added confDir.spec.ts which creates a temporary directory with a config.ini file and verifies startup() loads the token correctly.

Verified manually by running npm start -- deploy --confDir ./custom-folder.