x11/nwg-dock-hyprland: update to 0.4.7

While here:

• update license to MIT
• switch to GO_MODULE
• put list of installed files in pkg-plist

Changelog:

• https://github.com/nwg-piotr/nwg-dock-hyprland/releases/tag/v0.4.4
• https://github.com/nwg-piotr/nwg-dock-hyprland/releases/tag/v0.4.5
• https://github.com/nwg-piotr/nwg-dock-hyprland/releases/tag/v0.4.6
• https://github.com/nwg-piotr/nwg-dock-hyprland/releases/tag/v0.4.7

Reported by: Repology