fix: jest test generation and small example generation bugfixes

[mscolnick]

You can run the tests across all ts-sdk with:

cd seed/ts-sdk
pnpm i
pnpm test

Summary: 18 fails, 37 passes

• Some fail due to code generation of zurg (conflicting names
• Some fail when examples produce a Set and Sdk produces a List
• Some fail when examples produce a Date and Sdk produces a string

• fern/seed/ts-sdk/api-wide-base-path:
• fern/seed/ts-sdk/audiences:
• fern/seed/ts-sdk/enum-query-params:
• fern/seed/ts-sdk/examples:
• fern/seed/ts-sdk/exhaustive/no-custom-config:
• fern/seed/ts-sdk/exhaustive/retain-original-casing:
• fern/seed/ts-sdk/literal:
• fern/seed/ts-sdk/mixed-case/no-custom-config:
• fern/seed/ts-sdk/mixed-case/retain-original-casing:
• fern/seed/ts-sdk/package-yml:
• fern/seed/ts-sdk/pagination:
• fern/seed/ts-sdk/query-parameters/no-serde-layer-query:
• fern/seed/ts-sdk/response-property:
• fern/seed/ts-sdk/trace/exhaustive:
• fern/seed/ts-sdk/trace/no-custom-config:
• fern/seed/ts-sdk/trace/no-zurg-no-throwing:
• fern/seed/ts-sdk/trace/no-zurg-trace:
• fern/seed/ts-sdk/variables:

[dsinghvi]

@mscolnick unreal, thank you for the clear summary