More styles/ function for progress handle api

[yogeshlonkar]

Thank you for such a useful plugin!

I use "Non-LSP progress messages" for few custom tasks in my workspace. Right now handle:finish() and handle:cancel() both have same style and progress.display.done_style doesn't seem to affect the progress icon after finish/ cancel.

Can there be more functionality added to progress handle api such as?

• Indicate progress failed? (considering done is success)
• Set style for Progress done/ success (a success scenario)
• Set style for Progress failure

[wojciech-kulik]

Also, is it possible to change the text color? I thought that window.normal_hl should handle that, but it doesn't seem to do anything, the text is white.

Before breaking changes:

After: