You can do it by yourself. I would recommend looking at the page of all emoji list in Unicode. There you may find a link to the latest version of data in text files, which will be possible to parse quite easily with ObjectScript. So, you can just import that data and use it as you want. And you will need to update it regularly when it gets some new emojis.

$system.OBJ.Delete("SomePackage.SomeClass")

$system.OBJ.DeletePackage("SomePackage")

You can check how many license units available with this method $SYSTEM.License.LUAvailable()

And next depends on the kind of application, you develop. If it's some web application, and you have to achieve it for web session, I would try using %CSP.SessionEvents with OnLogin event, check how many license units are available and who is logging in, and decide to decline the login.

If you need it for some else ways of connections, I think the best place would be ZAUTHENTICATE.

CSP files are real files on disk and case sensitivity is depends on operating system. So, I suppose you using some Linux.

Should not be any problem if you use the same user both in Studio and VSCode. PROTECT error means you have security issue and your user not granted for write permission, or that database is just in read only mode

Look at this page, it may help you in understanding how to configure it.

If you need to store classes and mac routines separately, you can use

{
  "objectscript.export": {
    "addCategory": true
  }
}

In the case of different behavior for different types, and place only mac routines to the specific folder, use this.

{ 
  "obejctscript.export": {
    "addCategory": false,
    "folder": {
      "mac": "mac"
    }
  }
}

Have you tried $zf(-100) instead?