Configuration:
- PDF.js version: 2.0.550

Steps to reproduce the problem:
1. Render document in SVG mode `renderMode="svg"`

What is the expected behavior? (add screenshot)
Rendering annotations same way as they rendered on canvas

What went wrong? (add screenshot)
```
Warning: Unimplemented operator beginAnnotations
Warning: Unimplemented operator endAnnotations
```
gothRefObj,
      ]
      const task = new WorkerTask("test print"
      partialEvaluator.xref = xref;
      const annotation = await AnnotationFactory.create(
        xref,
        textWidgetRef,
        pdfManagerMock,
        idFactoryMock
      
      const annotationStorage = new Map(
      annotationStorage.set(annotation.data.id, {
        value: "こんにちは世界の",
      }
      const appearance = await annotation._getAppearance(
        partialEvaluator,
        task,
        annotationStorage
      
      const utf16String =
        "\x30\x53\x30\x93\x30\x6b\x30\x61\x30\x6f\x4e\x16\x75\x4c\x30\x6e";
      expect(appearance).toEqual(
        "/Tx BMC q BT /Goth 5 Tf 1 0 0 1 0 0 Tm" +
          ` 2.00 2.00 Td (${utf16String}) Tj ET Q EMC`
      
    }
    it("should render regular text for printing using normal appearance", async function () {
      const textWidgetRef = Ref.get(271, 0
      const appearanceStatesDict = new Dict(
      const normalAppearanceDict = new Dict(