Check pynitrokey version on firmware updates

[Laborratte5]

Check for pynitrokey updates before update firmware of pro, storage, start, fido2

This PR adds a version check of the pynitrokey tool, which is executed before every firmware update. Users will be warned about updates with older pynitrokey versions.

Changes

• Call the api.github.com on update commands to check for the latest pynitrokey version

Checklist

Make sure to run make check and make fix before creating a PR, otherwise the CI will fail.

• [X] tested with Python3.10.6
• [X] signed commits
• [X] updated documentation (e.g. parameter description, inline doc, docs.nitrokey)
• [ ] added labels

Test Environment and Execution

• OS: Archlinux
• device's model:
• device's firmware version:

Relevant Output Example

You are using an outdated version (0.4.30) of pynitrokey.
Latest pynitrokey version is 0.4.38
Updating with an outdated version is discouraged.
Do you still want to continue? [y/N]: 

Fixes #198

[robin-nitrokey]

Sorry for the delay. Tested and works fine for me. Thank you for the PR!