Add Chameleon PDA (#30514)

* V1 commit

* Remove PDA name and unnecessary pda state

* Adds PDA to Chameleon backpack & thief toolbox

* Change to use AppearanceDataInit

* Add basic PDA state to ensure there's always a sprite before AppearanceData can be applied

* Revert PDA name (this will be changed to another way later)

* Update PDA name updating to new system

* Fix yaml, and fix Agent ID chameleon

* Updated based on review

Content.Shared/PDA/PdaComponent.cs

@@ -13,12 +13,6 @@ namespace Content.Shared.PDA
         public const string PdaPenSlotId = "PDA-pen";
         public const string PdaPaiSlotId = "PDA-pai";
 
-        /// <summary>
-        /// The base PDA sprite state, eg. "pda", "pda-clown"
-        /// </summary>
-        [DataField("state")]
-        public string? State;
-
         [DataField("idSlot")]
         public ItemSlot IdSlot = new();