Add Zod schema for ambassadors

[MattIPv4]

In support of the work on the extension to allow it to fetch ambassador data in real-time from the website, adding schemas for the core data so that it may validate the structure of the API data.

[Copilot]

Copilot reviewed 6 out of 7 changed files in this pull request and generated 2 suggestions.

Files not reviewed (1)

• package.json: Language not supported

Comments skipped due to low confidence (2)

src/iucn.ts:22

• [nitpick] The function name isIUCNStatuses is misleading. It should be renamed to isIUCNStatus.

const isIUCNStatuses = (str: string): str is IUCNStatuses =>

src/iucn.ts:25

• [nitpick] The function name isIUCNFlags is misleading. It should be renamed to isIUCNFlag.

const isIUCNFlags = (str: string): str is ICUNFlags =>