Feature to modify wordnets in the database

*Updated:*

This issue is for tracking the feature for modifying wordnets in the database through Wn. Currently the feature has low priority and won't be implemented unless there's a need.

### Anyone who wants this feature please read the following:

If you have a use case where the lack of modifiable wordnets in Wn is holding you back, please:
1. Explain your situation in a comment
2. Indicate if you are a wordnet author/lexicographer or have some other role

*Original issue text:*
> For example, add, modify or delete words, senses, synsets or relations, ...

Start by reading the issue and its 28 comments to understand the requested modification use cases and whether a concrete scope was agreed. The request covers adding, modifying, or deleting words, senses, synsets, and relations in wordnets, but names no files, tests, or entry points. Done would require an agreed implementation scope and acceptance criteria.

Written by the indexing model from the issue text.