feat: include owned pets in login notifications

[iProdigy]

Relies upon base RL chat commands plugin

[Felanbird]

      "pets":[
         {
            "itemId":22746,
            "name":"Ikkle hydra"
         },
         {
            "itemId":11995,
            "name":"Pet chaos elemental"
         },
         {
            "itemId":12646,
            "name":"Baby mole"
         },
         {
            "itemId":12655,
            "name":"Pet kraken"
         },
         {
            "itemId":21273,
            "name":"Skotos"
         },
         {
            "itemId":12648,
            "name":"Pet smoke devil"
         },
         {
            "itemId":13320,
            "name":"Heron"
         },
         {
            "itemId":26901,
            "name":"Abyssal protector"
         }
      ]
   },