JSONEditor Svelte architecture choices

Immutable -> one-way data binding
All Actions based on JSONPatch
It must be possible to persist all state, including expanded/collapsed and selection.
State with search results, and, expanded state, and selection is separate from the JSON document itself, and are JSON objectswith the same structure, using symbols.
Must be able to open huge JSON files
- Must work directly on the JSON object itself, not on a wrapped object model
- Display only the first 100 items of an array etc. Or show items in groups of 100 items.
- Search must not crash on large files. Stop at 999 results or something.