add translation to Portuguese

Added translation into Portuguese on lib/l10n/app_pt.arb with reference to app_en.arb

Hey, I'm a native Portuguese speaker.
I have found some pretty important words missing and I'd like to help. I've tried the app locally and really liked it.

lib/l10n/app_pt.arb

@@ -499,6 +499,12 @@
   },
   "edit": "Editar",
   "@edit": {},
+  "loadingText": "Carregando...",
+  "@loadingText": {
+    "description": "Text to show when entries are being loaded in the background: Loading..."
+  },
+  "delete": "Deletar",
+  "@delete": {},
   "confirmDelete": "Tem certeza que deseja excluir '{toDelete}'?",
   "@confirmDelete": {
     "description": "Confirmation text before the user deletes an object",
@@ -557,4 +563,71 @@
       "productName": {}
     }
   }
+  "alsoKnownAs": "Também chamado de: {aliases}",
+  "@alsoKnownAs": {
+    "placeholders": {
+      "aliases": {}
+    },
+    "description": "List of alternative names for an exercise"
+  },
+  "verifiedEmail": "Email verificado",
+  "unVerifiedEmail": "Verificação pendente"
+  "verifiedEmailReason": "É necessário verificar seu email para contribuir com exercícios",
+  "verifiedEmailInfo": "Um email de verificação foi enviado para {email}",
+  "@verifiedEmailInfo": {
+    "placeholders": {
+      "email": {}
+    }
+  },
+  "close": "Fechar",
+  "@close": {
+    "description": "Translation for close"
+  },
+  "variations": "Variações",
+  "@variations": {
+    "description": "Variations of one exercise (e.g. benchpress and benchpress narrow)"
+  },
+  "oneNamePerLine": "Somente um nome por linha",
+  "whatVariationsExist": "Se houver alguma, quais as possíveis variações para esse exercício?",
+  "takePicture": "Tirar uma foto",
+  "@takePicture": {},
+  "chooseFromLibrary": "Escolher da galeria",
+  "@chooseFromLibrary": {},
+  "gallery": "Galeria de fotos",
+  "@gallery": {},
+  "addExercise": "Adicionar exercício",
+  "translation": "Tradução",
+  "translateExercise": "Traduzir este exercício",
+  "alternativeNames": "Outros nomes",
+  "images": "Imagens",
+  "language": "Idioma",
+  "previous": "Anterior",
+  "next": "Próximo",
+  "minutes": "Minutos",
+  "seconds": "Segundos",
+  "until_failure": "Até a falha",
+  "kilometers": "Quilômetros",
+  "glutes": "Glúteos",
+  "bench": "Supino",
+  "barbell": "Barra",
+  "triceps": "Tríceps",
+  "biceps": "Bíceps",
+  "dumbbell": "Haltere",
+  "abs": "Abdominal",
+  "chest": "Peito",
+  "shoulders": "Ombro",
+  "gym_mat": "Colchonete",
+  "incline_bench": "Supino inclinado",
+  "calves": "Panturrilha",
+  "legs": "Pernas",
+  "lats": "Dorsal",
+  "quads": "Quadríceps",
+  "hamstrings": "Posterior de coxa",
+  "arms": "Braços",
+  "pull_up_bar": "Barra fixa",
+  "lower_back": "Lombar",
+  "swiss_ball": "Bola suíça",
+  "kettlebell": "Kettlebell",
+  "none__bodyweight_exercise_": "nenhum (somente peso do corpo)",
+  "aboutPageTitle": "Sobre Wger"
 }