Packages cannot be added directly to a target. You need to put them into a module first and add this module to the target. See Create a Module to know how to do create a module.
Select the program where you want to add the new library in the project view, click on the right mouse button to make the project context menu appear and select Add Library.
Or from the main menu, select Project ▸ Add Library....
You need to select the target where you want to add the module in the target button above, and select the module that you want to add in the module view below. If you select a library inside a module, the parent module will be added.
When you are done, click on the Add button to add the module.
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