[Feature] Implement Get Pokemon by HP

[sbmsr]

What you need to do

Our API needs to support the ability to get all Pokemon, filtered by HP

Expected behavior

1. a request to http://localhost:3000/pokemon/hp?[gt]=250 should return HTTP status 200 and the following JSON body

  [
    {
      id: 242,
      name: { english: "Blissey", japanese: "ハピナス", chinese: "幸福蛋", french: "Leuphorie" },
      type: ["Normal"],
      base: { HP: 255, Attack: 10, Defense: 10, "Sp. Attack": 75, "Sp. Defense": 135, Speed: 55 },
    }
  ]

2. a request to http://localhost:3000/pokemon/hp?[gt]=250&[lt]=20 should return HTTP status 404 and the following JSON body

{
    error: "Not found"
}

3. a request to http://localhost:3000/pokemon/hp?[badComparator]=200 should return HTTP status 400 and the following JSON body

{ 
    error: 'Invalid Operator. Must be one of ["gt","gte","lt","lte"]' 
}