Add syntax for armor stand features

[sovdeeth]

Suggestion

Armor stands have various functionality that's not yet exposed in Skript. This issue serves as a checklist of what we do and don't have.

• Disabled slots (paper has more elaborate locking api, optional)
  • effect?
  • expression (with changer?)
  • condition
• show/hide arms
  • effect
  • condition
• show/hide baseplate
  • effect
  • condition
• marker
  • effect
  • condition
• size
  • expression (changer?)
  • effect?
  • condition
• poses (big ask, may or may not be feasible)
• canMove
  • effect
  • condition
• canTick
  • effect
  • condition

Agreement

• I have read the guidelines above and affirm I am following them with this suggestion.

[ShaneBeee]

Maybe at the same time add other armor stand things like show arms, base plate, marker, size, I can't remember what else there is.

[sovdeeth]

I'll just make this a general armor stand features issue, tbh