Adding lists to footnotes results to the generation of broken DOCX

[Markiz9999]

Library generates broken DOCX when adding lists to footnotes.

Example of issue reproduction: https://codesandbox.io/p/sandbox/2sqj2q

After investigation, it seems to be a problem in the https://github.com/dolanmiu/docx/blob/master/src/export/packer/next-compiler.ts. There is no logic that replaces the numbering for footnotes, as is done in other parts of DOCX.

As I can see, there is also no logic to image replacement for footnotes, so adding images to them will also break the file.