controlpanel_java_1.20.3 is a release file of the Minecraft resource pack Control Panel, made for Minecraft 1.20.3. It was published on December 5, 2023 and is 0.3 MB in size. For the full description, screenshots and every other version, visit the Control Panel resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.