[ShakilUrRehman21]

Description

In js/src/dom/event-handler.ts, normalizeParameters() checks nativeEvents.has(typeEvent) to distinguish native DOM events from custom events. If an event is not in nativeEvents, it retains the dot namespace in the event type:

if (!nativeEvents.has(typeEvent)) {
  typeEvent = originalTypeEvent // e.g. 'cancel.bs.dialog'
}
element.addEventListener(typeEvent, fn)

Because browsers do not recognize namespaced event names, registering namespaced listeners for valid modern DOM events (such as cancel.bs.dialog, beforeinput.bs.otp, or toggle.bs.popover) causes the listener to fail silently and never execute.

This PR adds standard modern DOM events to nativeEvents:

• beforeinput (used by OTP input and rich text controls)
• cancel and close (HTML5 <dialog> and <form method="dialog">)
• toggle (HTML5 <details> and Popover API)
• copy and cut (Clipboard API)
• drag, dragstart, dragend, dragenter, dragleave, dragover, drop (Drag and Drop API)
• selectionchange (Selection API)

Motivation and context

Ensures standard modern native DOM events can be namespaced and managed through Bootstrap's EventHandler utility.

Type of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I have read the contributing guide
• My code follows the code style of this project
• I have added tests that prove my fix is effective
• All new and existing unit tests passed
• Bundle size verified with npm run bundlewatch

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