feature: allow file upload for getuploadparams* apis

[shwstppr]

Fixes #144

When using cmk in its shell, the following APIs will prompt for file upload,

• getuploadparamsforiso
• getuploadparamsforvolume
• getuploadparamsfotemplate

The user can input file paths separated by a comma to allow uploading of files

cmk-file-upload.mp4

[github-actions]

✅ Build complete for PR #177.

🔗 Download the cmk binaries (expires on August 18, 2025)

[rohityadavcloud]

@shwstppr can we add a file= or filepath= parameter for only cmk to:

• check that file exists & is readable (mod bits...)
• move this in the first step itself, so cmk does not need to prompt the user and it simply / automatically upload the provided file or filepath to ACS
• optional - can we show some kind of upload progress bar (using ascii chars like [==== ] percent% here) like pv (https://www.geeksforgeeks.org/linux-unix/pv-command-in-linux-with-examples/)

https://github.com/charmbracelet/bubbles
https://github.com/cheggaaa/pb
https://github.com/briandowns/spinner (like 36)