Add db:info command which returns database configuration

[reilg]

Pull Request check-list

Please make sure to review and check all of these items:

• [x] Does npm run test pass with this change (including linting)?
• [ ] Does the description below contain a link to an existing issue (Closes #[issue]) or a description of the issue you are solving?
• [ ] Have you added new tests to prevent regressions?
• [ ] Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?

Description of change

I wanted to add a way to quickly check if a command would be performed against the correct database connection.

Add the db:info command.

Outputs:

Config {
  username: 'root',
  password: '***',
  database: 'test_database',
  host: 'localhost',
  port: '3306',
  dialect: 'mysql'
}

This isn't really very polished and no additional tests have been written to cover the command. I mainly wanted to open this PR to get comments and/or suggestions since I'm currently using this version for my current projects.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Americas]

The idea is great! Just make the output a little prettier and add some tests and we can add this.