feat: Exporting equations from docx files in latex format

[rateixei]

Adding capabilities to export equations from docx files with latex formatting. The code searches for oMath and oMathPara xml elements and translates them into latex.

Checklist:

• Documentation has been updated, if necessary.
• Examples have been added, if necessary.
• Tests have been added, if necessary.

[mergify]

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• title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert)(?:\(.+\))?(!)?:

[PeterStaar-IBM]

@rateixei If you add some tests and update the styling, we should be good with this one!