`replacer` duplicates line breaks when `keepOriginalStyles: true`

[SebKranz]

I presume that the following line duplicates non-textual elements in order to move w:Pr tags over to the inserted, and the right run.

docx/src/patcher/replacer.ts

Lines 68 to 82 in 9627957

	if (keepOriginalStyles) {
	const runElementNonTextualElements = runElementToBeReplaced.elements!.filter(
	(e) => e.type === "element" && e.name !== "w:t",
	);
	newRunElements = textJson.map((e) => ({
	...e,
	elements: [...runElementNonTextualElements, ...e.elements!],
	}));
	patchedRightElement = {
	...right,
	elements: [...runElementNonTextualElements, ...right.elements!],
	};
	}

However, the function for filtering non-textual elements currently doesn't account for <w:br>.

As a result, the w:br tag is added to the inserted run and also the right.

[SebKranz]

I've added a PR that solves this for w:br tags.

However, looking at section 17.3.3 of the Office Open XML spec at https://ecma-international.org/publications-and-standards/standards/ecma-376/, there are many tags that can exist within a text run.
In fact, it looks to me like w:Pr is the only run-child that should be duplicated.