Add a version command for checking noirup's version installed

[cypriansakwa]

Description

Problem*

Resolves #50: Add a version command for checking noirup's version installed

Summary*

This PR adds a robust version command to the noirup Bash script.

• Running ./noirup version will now print the version from version.txt if present.
• If version.txt is missing, the script falls back to displaying the latest git tag, commit hash, and date.
• This approach ensures users and developers always see accurate version information, whether using a release or working from source.

Additional Context

• The version check occurs before any other script logic for reliability and speed.
• For future releases, update version.txt to reflect the latest version.
• Developers working in a git repo without version.txt will see dynamic version details.

PR Checklist*

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings (N/A for Bash).

[cypriansakwa]

Hi @Savio-Sou ! Just a gentle reminder to take a look at this PR when you have a moment. Your feedback would be greatly appreciated. Thank you!

[cypriansakwa]

Hi. Just a gentle reminder to take a look at this PR when you have a moment. Your feedback would be greatly appreciated. Thank you!