feat(provider/quiverai): support SVG editing and animation

QuiverAI's Arrow 2 launch adds native SVG editing and animation. @ai-sdk/quiverai currently exposes generation and vectorization through generateImage; add these operations using the existing image-model interface.

Proposed scope:

• Extend providerOptions.quiverai.operation with edit and animate, routing to /v1/svgs/edits and /v1/svgs/animations.
• Use one source SVG in prompt.images; expose edit reference images separately through a typed provider option. Verify URL, binary, and base64 inputs against the API.
• Require an edit instruction; allow animation without an instruction. Map editing settings into the endpoint's nested settings object and expose maxReviewSteps and reasoning effort.
• Return SVG bytes, including animated SVGs. Preserve animation timing fields (loop_period_ms, opening_animation_ms) in per-image provider metadata.
• Build operation-specific request bodies and validate source counts, required fields, and batching. Preserve existing generation/vectorization behavior.
• Confirm model/operation availability through the live catalog and API-key permissions.

Acceptance criteria: request/response and invalid-input tests in Node and Edge, live verification for both operations, examples under examples/ai-functions/src/generate-image/quiverai/, provider documentation, and a patch changeset. No new video-model interface is needed for SVG output.

References:

• https://quiver.ai/blog/introducing-arrow-2-0
• https://docs.quiver.ai/api-reference/edit-svg/editsvg
• https://docs.quiver.ai/api-reference/animate-svg/animatesvg
• https://docs.quiver.ai/developers/models