Centralized contexts

The users should be able to define a context once that they'll reuse throughout their html application:

<script id="alpha" type="application/ld+json">
  {
    "@vocab": "https://alpha.happy-dev.fr/",
    "project": "https://alpha.happy-dev.fr/projects/"
  }
</script>

They can then use the context by passing it to their components:

<sib-display extra-context="alpha" data-src="project:4/"></sib-display>

They can also define a context as the default one, that will be used on any components that has no extra-context attribute, with the data-default-context attribute:

<script data-default-context type="application/ld+json">
  {
    "@vocab": "https://alpha.happy-dev.fr/",
    "project": "https://alpha.happy-dev.fr/projects/"
  }
</script>