Add CWLFloatInput to the available annotations

[gfenoy]

This pull request introduces support for float input variables in the CWL tool extraction workflow. The main change is the addition of the CWLFloatInput type, which allows users to annotate float inputs in their scripts and ensures they are properly handled and represented in the generated CWL tool definitions and command-line interfaces.

[mr-c]

Thank you @gfenoy ! Do you have time to add the relevant GitHub Actions CI setup, so we can see the tests passing? Or I can copy in a template from another CWL project.

[mr-c]

Since this repo hasn't seem much attentions recently, I would be happy to make you and/or @csajedi maintainers

[gfenoy]

Thank you for the proposition @mr-c.

I have worked on another PR, including various changes, and also the GitHub Action you requested.

If you have no time to review it, you can add me as a maintainer. However, I cannot commit too much time to maintenance tasks.

I close this PR.