Snow dir support

[vbsh123]

Pull Request Template

Description

Added support for --snow-dir option in the CLI commands, you can now run commands based on the value provided in the option.

Fixes #16

Checks

• [ V] I added my name to the contributor list in CONTRIBUTORS.md
• [ V] I understand that my work will be licensed under the given license of SnowFS
• [ V] I am the original author, or I have authorization to submit this work.

Type of change

Please delete options that are not relevant.

• [ V] New feature (non-breaking change which adds functionality)
• [ V] This change requires a documentation update