Implement webpage structured data object

[Sebobo]

See https://schema.org/WebPage

Example:

{
  "@type": "WebPage",
  "@id": "<https://example.org/subpage/>#webpage",
  "url": "<https://example.org/subpage/>",
  "inLanguage": "<en-US>",
  "name": "<The pages title>",
  "isPartOf": {
    "@id": "<https://example.org/>#website"
  },
  "image": {
    "@type": "ImageObject",
    "@id": "<https://example.org/subpage/>#primaryimage",
    "url": "<https://example.org/path/to/image.jpg>",
    "width": <1200>,
    "height": <600>,
    "caption": "<Caption of image>"
  },
  "primaryImageOfPage": {
    "@id": "<https://example.org/subpage/>#primaryimage"
  },
  "datePublished": "<2019-04-29T12:04:11+00:00>",
  "dateModified": "<2019-04-30T03:20:41+00:00>",
  "description": "<The pages description>",
  "breadcrumb": {
    "@id": "<https://example.org/subpage/>#breadcrumb"
  }
}

• Replace all <xyz> parts with parameters from the page.
• All props with #xyz at the end can be added later when a structured data graph is introduced.
• Should be rendered on all pages