Add --version flag to print QType version

[loukratz-bv]

User Story

As a QType developer, I want to check the installed version using qtype --version so that I can verify which version I'm running and report issues accurately.

Problem/Motivation

Currently there's no way to check the QType version from the CLI. Users need to manually inspect package metadata or use pip show qtype to determine their version, which is cumbersome during debugging or issue reporting.

Use Cases

1. Bug reporting: Include accurate version information in GitHub issues
2. Troubleshooting: Verify if running the latest version before debugging
3. CI/CD pipelines: Confirm correct version installed in automated environments
4. Team coordination: Ensure all developers are using the same version

Example:

$ qtype --version
qtype 0.1.16

$ qtype -v
qtype 0.1.16