Bug: Cannot paste google doc indented paragraph correctly

Lexical version: 0.11.3

## Steps To Reproduce

1. Type a paragraph and indent the first word via tab (or you can use this [google doc sample ](https://docs.google.com/document/d/1rhCk7Gpc6KqngbE_-cMS74VIZuoL9fFO3ruposgwOGE/edit?usp=sharing))
2. Copy and paste to playground

Link to code example:

## The current behavior
The first paragraph looks different, the indent apply to whole paragraph instead of first sentence.


## The expected behavior
The indent should only apply to first sentence.

Start by reproducing the paste from the linked Google Doc in the Lexical playground using version 0.11.3, then compare the first paragraph with the screenshot and expected behavior. Trace the paste handling entry point responsible for imported paragraph indentation; done means indentation applies only to the first sentence rather than the whole paragraph.

Written by the indexing model from the issue text.