A scripts panel for Adobe Creative Cloud apps that don't have a scripts panel, e.g. Premiere Pro.
The ZXP file can be found in the Release folder.
This panel is very rudimentary. It will look for a folder below your Documents folder.
<Documents>/Adobe Scripts/<AppName>/whatever.jsx
When you run (e.g. Premiere Pro, InDesign, Illustrator...) the scripts in that folder will be listed in a popup menu, and you can select one and click the 'Run' button.
For example, for 'Premiere Pro' and you want to install 'myscript.jsx', you need to copy the script to (Mac):
~/Documents/Adobe Scripts/Premiere Pro/myscript.jsx
or (Win)
%USERPROFILE%\Documents\Adobe Scripts\Premiere Pro\myscript.jsx
to make it appear on the popup menu.
If the scripts don't show up on Mac, make sure the Adobe application has access to the Documents folder in the System Preferences.
It's happened to me with Photoshop 2021 that the System Preferences were set to disable access to the Documents folder, and that made it seem like the panel was not working.
Go to System Preferences - Security & Privacy - Files and Folders
Find the Adobe app you're using in the list and make sure 'Documents Folder' is ticked.