Add Inklecate version

Inklecate should have an option to display the version and exit early. In Linux, `inklecate -v` is reserved for verbose mode, so we should pick another letter (or add a long option `--version`).

It serves as a way to know what version of the binary we are working with, as well as testing the binary is working normally.

Start at Inklecate's command-line option handling and inspect how the existing Linux `-v` verbose option is defined. Choose a non-conflicting short option or add `--version`; done means the binary prints its version, exits early, and continues to support verbose mode.

Written by the indexing model from the issue text.