hyprpaper: add page

[EmiFree]

Added documentation for hyprpaper, a wallpaper utility for Hyprland, including usage instructions and commands.

Checklist

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The page(s) follow the style guide.
• The PR contains at most 5 new pages.
• The PR is authored by me, or has been human-reviewed if it was created with AI or machine translation software.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):
• Reference issue: #

[Managor]

Other than this, this looks good to go.

[ivanbaluta]

I have a question regarding dynamic usage. Does hyprctl hyprpaper preload /path/to/image work as expected, or is preloading only possible via the config file?
If the CLI command works, I think it's a very important command that should be added here.

[EmiFree]

I have a question regarding dynamic usage. Does hyprctl hyprpaper preload /path/to/image work as expected, or is preloading only possible via the config file? If the CLI command works, I think it's a very important command that should be added here.

Thank you for pointing that out, I guess I missed that. I reviewed the documentation and tested on my own, and updated the md file with a working example using preload.

[ivanbaluta]

Thanks for testing and updating!
However, I suspect there might be a syntax error regarding the arguments, specifically the {{monitor}} part.

1. Preload syntax: Since preload loads the image into RAM globally (not for a specific screen), it usually only takes the file path. The config syntax is just preload = /path/to/img.
   Shouldn't the command be:
   hyprctl hyprpaper preload "{{path/to/image.png}}"
2. Reload command: Does hyprctl hyprpaper reload actually accept arguments like monitor and image?

Could you please double-check the exact syntax for these two commands

[EmiFree]

You are right, I must have gotten preload and reload mixed up. Preload only accepts an image path, but reload accepts a monitor and an image path.

[ivanbaluta]

Thanks for your contribution!