feat(oagen[3/3]): Add remaining generated serializers, fixtures, and specs

[gjtorikian]

Description

This is the companion to PR #1536. That PR included only the generated files that are transitively imported by modified service code. This PR adds everything else the generator produced: 285 files that are not yet imported by any service method but exist to complete the SDK's type coverage.

What's in here and why

The generator creates a full set of artifacts for every schema in the OpenAPI spec, regardless of whether the current SDK code uses it yet. That means:

103 serializers — serialize* and deserialize* functions for API objects that don't yet have service methods calling them. For example, audit-log-event.serializer.ts can serialize/deserialize the full audit log event shape, even though audit-logs.ts currently only exposes createEvent and createExport. These become useful as we wire up additional endpoints.

13 interfaces — standalone types that aren't imported by anything in PR #1536. Things like Role, RoleList, AuditLogSchema, DirectoryUserWithGroups—types the API returns but that no existing SDK method currently deserializes into.

6 spec files — tests for the six new user-management sub-services introduced in PR #1536 (CORS origins, JWT templates, redirect URIs, session tokens, authorized applications, data providers). These import fixture JSON files to mock API responses.

163 fixture files — .fixture.json files used by the specs above and by future tests. Each one is a representative JSON response for an API object, pulled from the OpenAPI spec examples.

Why a separate PR

PR #1536 is the one to scrutinize—it modifies existing behavior, adds new service classes, and wires things into workos.ts. This PR is purely additive: new files that nothing currently imports (except the specs, which test the sub-services from #1536). Splitting it out keeps the review surface manageable and lets a reviewer skim this one quickly while focusing attention on #1536.

Note: this is the third of three PRs, after #1535 (new services) and #1536 (existing service updates).

[gjtorikian]

this output was a mistake and could have been vastly reduced into just #1536