Feat: Add multiline support for editing objects and arrays in `on.editInspectorState`

[spaansba]

Problem

Currently, editInspectorState uses an <input/> element for editing values. This works fine for primitives, but becomes difficult when editing objects or arrays.

Proposed solution:

Switch to a <textarea> (or similar multiline input) when the value being edited is an object or array. This would allow:

• Better visibility of the JSON structure
• Easier editing with proper line breaks and indentation
• Reduced chance of syntax errors

Example

Tanstack Devtools already does this:

Recording.2025-12-14.194100.mp4

I'll happily open a PR to add this feature