docs(window): add userland example for detecting drag-stopped and res…

[Khyati-Kapil]

docs(window): add userland example for detecting drag-stopped and resize-stopped events

This PR adds a userland JavaScript example demonstrating how developers can
detect when a window drag or resize operation has stopped by listening to
the continuously emitted tauri://move and tauri://resize events and
debouncing them.

Since native drag-end / resize-end events are not currently exposed by Tauri
and JS event detection is not reliable enough to be implemented in the
runtime, this example provides a recommended, practical solution for
developers needing this behavior.

The new section is added to learn/window-customization.mdx where other
window interaction examples (dragging, maximizing, custom titlebars) are
already documented.

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[Legend-Master]

Hey, thanks for working on this, but I'm not sure how useful is it to leave a very much incomplete solution like this, and by

I think this should be done on user land

I meant if a user wants to do it, they can, I don't mean we should document this in our guides, since those guides are meant to be the approaches we recommend

Sorry for being harsh on this, hope you understand 🙏

[Khyati-Kapil]

Thank you for the clarification — that makes sense.

I misunderstood the original intention behind “should be done in userland”.
Totally understand your point about the guides reflecting recommended
approaches only. No worries at all — thanks for explaining it clearly.

If a more complete or reliable approach becomes possible in the future, I’d be
happy to revisit the idea in a way that aligns with Tauri’s recommendations.