feat: add "GPU Screen Recorder"

[azzamsa]

Description

Short description of the changes:

Checklist

I have:

• 🤳 made sure that what I am adding is an app for end users, not a developer tool / library (no "wl-clipboard-rs")
• 🔗 checked that the link I am using refers to the root of the project (example, https://mpv.io) or GitHub repo if the first is not available
• 🤓 checked BOTH the name and the casing of the project(s) I am adding ("GNOME Terminal" and not "gnome-terminal", "bemenu" and not "Bemenu", etc.)
• 💣 checked that I am using spaces for indentation and that my levels are correct (no tabs!)
• ✋ checked that my section has the correct casing ("My section", and not "My Section")
• 📝 checked that the projects and / or the section are alphabetically sorted ("Clipboard manager" then "Color picker", "bemenu" then "Fuzzel")

[azzamsa]

A more "user-friendly" page is https://flathub.org/apps/com.dec05eba.gpu_screen_recorder, but I don't think it is the page you wanted (root project).

I tried other recording tools on my Fedora 40, nothing works but OBS and GPU Screen Recorder