Bug: Pasting text AND images from Microsoft Word (Client) omits the picture in the playground

Lexical version: 0.12.2

## Steps To Reproduce

1. Open Microsoft Word (Client).
2. Write some text and paste an inline image.
3. Copy text AND inline image.
4. Paste into Lexical's playground.

Link to code example: https://playground.lexical.dev/

## The current behavior
Pasting text AND images from Microsoft Word (Client) omits the picture in the playground.

## The expected behavior
Pasting text AND images should include all content. **Do note, this works as expected in the Microsoft Word browser version.**

Start by reproducing the issue in https://playground.lexical.dev/ using Microsoft Word Client, then compare the same paste from Word in a browser. Trace the playground's paste and clipboard handling to find why mixed text and inline-image content loses the image. Done means pasted text and images are both retained, matching the expected browser behavior.

Written by the indexing model from the issue text.