Create kh-tin

[siwhitehouse]

Create a new list for Tax Identifier Numbers issued by the General Department of Taxation in Cambodia

[siwhitehouse]

This relates to #675 and is based on research of unofficial sources such as TaxDo and a shared business registration certificate.

[emmajclegg]

All looks sensible @siwhitehouse

On "listType": "primary" - is this right for a tax identification number? I think I've previously put these as secondary lists because the entity is typically already registered on a government registrar elsewhere before it can apply for a tax number...?

[siwhitehouse]

Thanks @emmajclegg - yes, you're right, it should be secondary. I'll edit that now.