Extract code snippets from working-with-paragraphs.md

[mikeebowen]

Extract the code snippets from [docs/word/working-with-paragraphs.md](https://github.com/OfficeDev/open-xml-docs/blob/main/docs/word/working-with-paragraphs.md and use docfx snippets to retrieve them from the samples folder and audit the text.