[FEATURE] Codebook Addition

[rsh52]

Feature Request Description

Give an option that lets users create a publication-quality codebook, with functions such as:

• write_codebook_html()
• write_codebook_word()
• write_codebook_md()

The codebook should support skimr.

Checklist

• [ ] The issue is atomic
• [x] The issue description is documented
• [x] The issue title describes the problem succinctly
• [ ] Developers are assigned to the issue
• [x] Labels are assigned to the issue