fix(docx): preserve custom numbering text prefix in list markers (#3425)

* fix(docx): preserve custom numbering text prefix in list markers

* DCO Remediation Commit for Brighton <brighton@Brightons-MacBook-Air.local>

I, Brighton <brighton@Brightons-MacBook-Air.local>, hereby add my Signed-off-by to this commit: b92e32597ba257b0e2cac85df8c88dcee26bd0a6

Signed-off-by: Brighton <brighton@Brightons-MacBook-Air.local>

* fix: resolve lint errors in test (unused vars, import order)

Signed-off-by: Brighton <brighton@Brightons-MacBook-Air.local>

* style: fix ruff lint and format

Signed-off-by: Brighton <brighton@Brightons-MacBook-Air.local>

* refactor: move import re to top of file

Signed-off-by: Brighton <brighton@Brightons-MacBook-Air.local>

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Signed-off-by: Brighton <brighton@Brightons-MacBook-Air.local>
Co-authored-by: Brighton <brighton@Brightons-MacBook-Air.local>