fix(react): recreate SelectionArea instance when props change

[kaigritun]

Summary

Fixes #226

The React component had an empty dependency array in its useEffect, which meant the component never reacted to prop changes. This is unlike the Vue implementation which uses watchEffect to auto-track dependencies.

Changes

• Add configuration props (boundaries, document, selectables, startAreas, container, behaviour, features) to the useEffect dependency array
• Use useRef for callback props to avoid unnecessary instance recreation when only callbacks change
• Use useMemo with JSON.stringify for object props (behaviour, features) to provide stable dependency comparison
• Forward remaining HTML attributes to the container div via rest props

Behavior

Before: Changing any prop after initial mount had no effect - the SelectionArea instance was never updated.

After:

• When configuration props change, the instance is destroyed and recreated (matches Vue behavior)
• When only callback props change, the callbacks are updated via refs without recreating the instance (performance optimization)

Notes

As mentioned in the issue, the core module doesn't support dynamic option updates, so recreating the instance is the correct approach. This matches the Vue implementation's behavior.

[simonwep]

Thank you for this high-quality PR, I'll have a look at it soon! :)

[simonwep]

I'll have to do some work to be able to release a new version since it's been a while and I have to update all dependencies first... :) Made some minor changes to support preact and fix an issue in how options are resolved.