chore: release version 3.3.0

[mcampa]

Cuts the v3.3.0 release. Merging this triggers the NPM Publish workflow.

What's in this release

• feat: `contact` and `license` fields on `GenerateOpenApiDocumentOptions` — feat: add contact and license to GenerateOpenApiDocumentOptions #157 by @liorp
• feat: support zod v3 (≥3.25) alongside v4 via the `zod/v4` permalink import; widens the `zod` peer dep to `^3.25.0 || ^4.0.0` — fix: complete zod/v4 migration (supersedes #158) #161 (supersedes Follow zod guidance on supporting v4 - for users incrementally migrating from v3 #158 by @Sam152)
• fix: bump `zod-openapi` to 5.4.6 and raise its peer dep minimum to `^5.4.4` to prevent the discriminated-union crash on zod ≥4.1.13 — fix: bump zod-openapi to 5.4.6 with discriminated-union regression test (supersedes #151) #162 (supersedes Fix: update zod-openapi to 5.4.5 #151 by @gaetansenn)
• fix: add `x-${string}` extension index signature to `OpenApiContactObject`/`OpenApiLicenseObject` so they satisfy `zod-openapi`'s `InfoObject` — fix: add OpenAPI extension index signature to contact/license types #160
• chore: bump `h3` to `^1.15.5` — chore: bump h3 to ^1.15.5 #159 by @cpimhoff

Why minor and not major

`zod-openapi` peer dep tightening (`^5.0.1` → `^5.4.4`, #162) is technically a restriction, but versions 5.4.0–5.4.3 were already broken for any consumer on zod ≥4.1.13 — this is a guardrail, not a real break.

`zod` peer dep widening (`^4.0.0` → `^3.25.0 || ^4.0.0`, #161) is additive.

Test plan

• `pnpm run build` (tsc + jest + cjs + esm): 130/130 tests passing
• CHANGELOG.md updated with PR links and contributor credits
• CI green
• NPM publish workflow on merge

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