Get the total amount of car makes in the system

[VasAtanasov]

Get the total number of car makes.

{
   "makers":[
      {
         "modelsCount": {integer},
         "name": {string}
      },
      {
         "modelsCount": {integer},
         "name": {string}
      },
      ...
   ],
   "makersCount": {integer}
}