✨ Xero Integration (#639)

* ✨ Xero Integration

* ⚡ Add contact resource

* 🐛 Small fix

packages/nodes-base/nodes/Xero/IContactInterface.ts

@@ -0,0 +1,44 @@
+
+export interface IAddress {
+	Type?: string;
+	AddressLine1?: string;
+	AddressLine2?: string;
+	City?: string;
+	Region?: string;
+	PostalCode?: string;
+	Country?: string;
+	AttentionTo?: string;
+}
+
+export interface IPhone {
+	Type?: string;
+	PhoneNumber?: string;
+	PhoneAreaCode?: string;
+	PhoneCountryCode?: string;
+}
+
+export interface IContact extends ITenantId {
+	AccountNumber?: string;
+	Addresses?: IAddress[];
+	BankAccountDetails?: string;
+	ContactId?: string;
+	ContactNumber?: string;
+	ContactStatus?: string;
+	DefaultCurrency?: string;
+	EmailAddress?: string;
+	FirstName?: string;
+	LastName?: string;
+	Name?: string;
+	Phones?: IPhone[];
+	PurchaseTrackingCategory?: string;
+	PurchasesDefaultAccountCode?: string;
+	SalesDefaultAccountCode?: string;
+	SalesTrackingCategory?: string;
+	SkypeUserName?: string;
+	taxNumber?: string;
+	xeroNetworkKey?: string;
+}
+
+export interface ITenantId {
+	organizationId?: string;
+}