Add RecycleList (virtualized list)

[haywoodfu]

I’d like to contribute a RecycleList component for large-list performance.

Why
Normal lists render all items at once, which can cause startup jank with large datasets, especially on lower-end mobile devices.

Proposal
Add a reusable virtualized list component that:

• Renders only rows near the viewport
• Recycles row nodes while scrolling
• Supports dynamic row heights
• Keeps UX consistent with a normal list

Preview

Suggested API
RecycleList(RecycleListProps { items: &rows, buffer: 8, render_item: |row, idx| rsx! { ... } })

If accepted, I will submit a PR with

• Primitive implementation in dioxus-primitives
• Styled demo in preview
• Tests and docs

Reference implementation
https://github.com/haywoodfu/dioxus-recycle-list