Player Armor Stands

##New Features:* Updated mod icon

• Updated armor stand item render: it will now display the player's head for the given armor stand by default (temporarily Fabric only)
• Improved determination of which texture should be used for the stand
• Removed support for 1.21.1

##Technical New Features* Added a new special model pas:armor_stand

• The model has a state parameter, where you need to specify the state of the body parts: head, body, left_arm, right_arm, left_leg, and right_leg
• Each body part has a rotation (a list of 3 numbers), which you can use to set the part's rotation, and mode, which determines the display behavior of the body part.
• There are 4 display modes:

1. dynamic: the model for the body part will be automatically selected based on whether a skin is loaded or not
2. original: this part will be displayed as an armor stand regardless
3. invisible: this part will not be displayed
4. player: the body part will be a player regardless

• You can find more details on how to work with this model by looking at the built-in resource packs or in Player Pickaxes