fix: add version command to Specify CLI #811

[lshgdut]

Add features to Specify CLI:

• version sub command
• --version flag for root command

Closed issues: #486 #811

[Copilot]

Pull Request Overview

This PR adds version display functionality to the Specify CLI by implementing both a version subcommand and a --version flag for the root command. The changes utilize Python's importlib.metadata to dynamically retrieve the package version.

• Added version subcommand that displays the application version
• Added --version flag to the root command callback for immediate version display
• Integrated importlib.metadata to dynamically fetch package version information

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[localden]

Thank you for the contribution. We will be introducing support for the --version argument in #986