Add passing style_map kwarg to Mammoth when converting docx to allow keeping comments

[VillePuuska]

Mammoth, which is used for converting docx, allows specifying custom mappings for docx styles => html elements; see https://pypi.org/project/mammoth/#custom-style-map By default, Mammoth ignores comments in docx files. These custom style maps allow including comments in the generated html; see https://pypi.org/project/mammoth/#comments

This PR adds passing this style_map kwarg to Mammoth when converting a docx file. Tests are also added for specifically converting comments using a style map.

For example, using style_map="comment-reference => ", the two comments added to the test file are added to the converted markdown as follows:

... build LLM applications[[1]](#comment-0) via ...

| 1 | 2 | 3 | 4 | 5 | 6 |
| --- | --- | --- | --- | --- | --- |
| 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 49e168b7-d2ae-407f-a055-2167576f39a1 | 15 | 16 | 17 |
| 18 | 19 | 20 | 21 | 22 | 23[[2]](#comment-1) |
| 24 | 25 | 26 | 27 | 28 | 29 |

Comment [1]

This is a test comment. 12df-321a [↑](#comment-ref-0)

Comment [2]

Yet another comment in the doc. 55yiyi-asd09 [↑](#comment-ref-1)

Note: The new test file was created by adding comments to the existing file test.docx using LibreOffice. I'm not sure if using LibreOffice for this messes with the document in some way or if MS Word comments would be somehow different so it might make sense for a maintainer to add a suitable test file instead or include comments directly to test.docx.

Resolves #31

[VillePuuska]

@microsoft-github-policy-service agree

[afourney]

This is pretty cool. I wonder if it's worth making this default. Will decide that later.