add create product endpoint

internal/models/models.go

@@ -59,3 +59,11 @@ type ProductClaims struct {
 	Id     int
 	Claims []Claim
 }
+
+type UserClaimForm struct {
+	Evidence_type EvidenceType
+	Evidence      struct{}
+	Claims        []ClaimType
+	Counterclaims []ClaimType
+	Created_by    string
+}