+cfitsio

[JrGoodle]

closes #384

[what-the-diff]

PR Summary

• Added new file mode
  A new file mode has been introduced.
• Created package.yml for cfitsio
  This PR contains the creation of a package.yml file for cfitsio project.
• Source code URL and stripping version number
  The source code can be downloaded from the provided URL and the version number will be removed after download, allowing for multiple versions to be installed simultaneously.
• zlib requirement for darwin systems
  zlib is required for building the project on darwin systems, but not necessary for Linux as it's already included in distributions.

[JrGoodle]

thanks for the assist!

[jhheider]

you're welcome :)