UX Improvement: Downloading/ Uploading files

[anilmurty]

One bug and 2 improvement suggestions:
Bug: When downloading from the shell (and likely the log tab too but did not test that specifically) - the formatting is messed up:

Improvement suggestion:
It wasn't immediately clear to me that the "Download File" button (on the SHELL tab) downloads CLI output from the provider and allows saving it locally - I tended to think that the button let's me download files on to the provider (since I am SSH'ed into the provider at the time) - in other words I thought this was an "upload function" - could be just me though :) -- this brought up two things in my mind:

1. Should we rename the buttons to "Save CLI Output Locally" or something?
2. Should we offer an easy upload function? - in my case, I was experimenting with ComfyUI and needed to upload checkpoint files, VAE files and Upscaler files to 3 different sub directories on the provider. The process was to cd into each and use wget. Having a way to hit a button, enter the destination (or better still have a navigable UI) and select the file(s) to upload from the local file system, might be helpful.

[Redm4x]

Improvement have been done in #36 to try and make it more clear.

• Improved error handling, should no longer stay in the "Downloading..." state forever when an error happen.
• Added validation to the input to indicate that a valid file path is required and not an url.
• Added a "Experimental feature" warning since it can still be a bit buggy in some cases.
  

[anilmurty]

Thanks @Redm4x! - still working on upload feature, I assume?