`closed_compounds` doesn't handle inflected forms

**Describe the bug**
`linting/closed_compounds.rs` closes compounds incorrectly written with a space between the parts that shouldn't be there: "any body", "desk top", "under clock", etc.

But it ignores inflected forms: "any body's", "desk tops", "under clocking", etc.

**To Reproduce**
Steps to reproduce the behavior:
1. Type something like "I bought another lap top so now I have two lap tops."
2. Notice that only the singular form is flagged with the suggestion `Did you mean the closed compound noun “laptop”?`

**Expected behavior**
All related forms should be corrected.

**Screenshots**

**Additional context**

Since it's implemented as a macro that assigns a name for a setting for a single mapping, it would be clunky to have to have separate settings `Desktop` and `Desktops`. Rather a solution similar to how I split `phrase_set_corrections` off from `phrase_corrections` would allow all forms of a term to be corrected under a single setting in the options.

Start in linting/closed_compounds.rs and reproduce the reported singular/plural behavior with “lap top” and “lap tops.” Then compare the existing phrase_set_corrections and phrase_corrections approach to determine how related inflected forms can share one setting; done means all related forms receive the closed-compound suggestion.

Written by the indexing model from the issue text.