asusctl: add page

[xinghewumeng]

Closes #23662

• 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.

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Description

Add documentation page for asusctl, system control utility for ASUS ROG and TUF laptops on Linux.

Commands included

• Display the current power and fan profile (asusctl profile -p)
• Switch to the next power and fan profile (asusctl profile -n)
• Set a specific power and fan profile (asusctl profile -s)
• Set the keyboard LED backlight mode (asusctl led-mode)
• Set the battery charge threshold limit (asusctl -c)
• Display the current GPU graphics mode (asusctl graphics -g)
• Set the screen panel overdrive state (asusctl bios --panel-od)
• Display current system information and capabilities (asusctl info)