Create and manage agent Views (saved ticket filters) via the Zendesk Views API

Steps

1. Authenticate as with other Zendesk Ticketing endpoints: HTTP Basic Auth using {email_address}/token:{api_token} base64-encoded in the Authorization header, or OAuth
2. Create a view with POST /api/v2/views, sending a view object with a required title and a required all array of conditions that must include at least one condition on status, type, group_id, assignee_id, or requester_id; optionally add an any array, description, active flag, output.columns, and a restriction object (type "Group" or "User" with id/ids) to limit visibility
3. Validate a condition set before saving with POST /api/v2/views/preview (or just get the resulting count via POST /api/v2/views/preview/count), nesting the same conditions under a view property
4. List views with GET /api/v2/views (variants: List Views By ID, List Active Views, List Views - Compact, Search Views, Count Views) and fetch a single one with GET /api/v2/views/{id}
5. Update a view's title/conditions/output/restriction with PUT /api/v2/views/{id} (or Update Many Views for several at once), and remove views with DELETE /api/v2/views/{id} or Bulk Delete Views
6. Pull the tickets currently matching a view via Execute View, or just its count via Count Tickets in View/Views