[component] Xero

[ivicac]

As a Workflow Developer I want to be able to use the Xero connector.

Acceptance Criteria

Actions:

• [x] create Contact
• [x] create an Invoice with Invoice Line Items
• [x] create Bills with Bill Lines Items
• [x] create Quote with Quote Line Items

Triggers:

• [x] new Contact
• [x] new Invoice
• [x] new Bill
• [ ] new Quote

Definition of Done:

• [ ] Unit/Integration tests
• [ ] Documentation