With this update, the possibility to add commands to armor stands has been added. This was suggested by @RodriGamer35.

To attach a command to an armor stand, open it's properties menu by double shift right-clicking it. There you will find a new element that looks like a command block. Clicking on that will bring up a menu in chat that asks what you want to do.

Click one of the options, optionally add the command line after the text that gets inserted into your chatline, and hit enter.

Copying an armorstand does not copy it's attached commands. Those need to be copied manually.