feat(api particulier): add DGFiP adapter

spec/fixtures/files/api_particulier/avis_imposition.json

@@ -0,0 +1,33 @@
+{
+  "avis_imposition": {
+    "declarant1": {
+      "nom": "FERRI",
+      "nomNaissance": "FERRI",
+      "prenoms": "Karine",
+      "dateNaissance": "12/08/1978"
+    },
+    "declarant2": {
+      "nom": "",
+      "nomNaissance": "",
+      "prenoms": "",
+      "dateNaissance": "12/08/1978"
+    },
+    "dateRecouvrement": "09/10/2020",
+    "dateEtablissement": "07/07/2020",
+    "nombreParts": 1,
+    "situationFamille": "Célibataire",
+    "nombrePersonnesCharge": 0,
+    "revenuBrutGlobal": 38814,
+    "revenuImposable": 38814,
+    "impotRevenuNetAvantCorrections": 38814,
+    "montantImpot": 38814,
+    "revenuFiscalReference": 38814,
+    "anneeImpots": "2020",
+    "anneeRevenus": "2020",
+    "situationPartielle": "SUP DOM"
+  },
+  "foyer_fiscal": {
+    "annee": 2020,
+    "adresse": "13 rue de la Plage 97615 Pamanzi"
+  }
+}