Support HTML annotations in content search annotation rendering

[lukew-cogapp]

Enhancement suggestion.

Currently, content search only renders plain text, see

clover-iiif/src/components/Viewer/InformationPanel/ContentSearch/Item.tsx

Line 114 in 69c6cf2

<AnnotationItemPlainText

Elsewhere in the codebase, you check the body type and use the appropriate component (plain / HTML / VTT / image):

clover-iiif/src/components/Viewer/InformationPanel/Annotation/Item.tsx

Line 51 in 69c6cf2

function renderItemBody() {

The use case here is for enhancing search results, for example, with:
Text surrounding <mark>your search term</mark> example

However, you may want to sanitise this (perhaps your existing AnnotationItemHTML component does this already?) as I can imagine plenty of markup here that could break things. We do a similar thing on Storiiies viewer:
https://github.com/CogappLabs/StoriiiesViewer/blob/5da2e2a7d3b020f63b789bcb3328f8d0dad1c8ed/src/StoriiiesViewer.ts#L145