JSON-formatted item names are rendered as JSON

[AmauryCarrade]

In recent versions, Minecraft use JSON text components to format item titles. When such items are displayed in a report, the raw JSON is shown. Example.

We should implement a JSON text component → HTML parser/renderer (in Rust? maybe the Minecraft text part will be in an external crate in the future) to handle that. All reports will be fixed by re-processing all of them.