feat: Add support for Zis Connection, Zis Token and zis webhook

[Vico1993]

Description

This PR introduces new features to the Zendesk API service integration:

• Adds the ability to create OAuth access tokens via createZendeskAccessToken method.
• Implements methods to create ZIS (Zendesk Integration Services) connections (createZisConnection) and inbound webhooks (createZisInboundWebhook).
• Adds corresponding TypeScript models for the new API responses.
• Includes comprehensive tests for these new service methods to verify correct request payloads.

These enhancements enable programmatic creation and management of access tokens, connections, and webhooks for Zendesk integrations within the service.

How to manually test

1. Use the test suite to verify new coverage:

   npm run test __tests__/services/zendesk-api-service.spec.ts

2. Alternatively, instantiate ZendeskApiService and call:
   • createZendeskAccessToken(clientId, scopes)
   • createZisConnection(integrationName, token, connectionName, allowedDomain)
   • createZisInboundWebhook(integrationName, token, sourceSystem, eventType)
3. Confirm that the requests are correctly formatted and the responses match expected interface structures.

Include label

• Version: Minor

Acceptation criteria

• Added the corrected label to my pull request
• Added/updated tests impacted by the change
• Documentation is up-to-date (README.md / INSTALL.md)
• Manually tested?

[github-actions]

LGTM! 🤖 🚀 🔥

Dismiss bot.

[github-actions]

Bump version from 0.7.0 to 0.8.0

[github-actions]

LGTM! 🤖 🚀 🔥