[STYLE_bug] When styling does not find a box::use, all lines are converted into NA

[radbasa]

          @jakubnowicki Will need to go back to `box.linters::style_*`.

0.10.2 converts:

# View: Shiny modules and related code.
# https://go.appsilon.com/rhino-project-structure

to

NA
NA

Originally posted by @radbasa in Appsilon/rhino#607 (comment)

[radbasa]

We can do either of two things:

1. Implement and activate the exclude_files parameter of box.linters::style_box_use_dir()
2. Fix the bug converting the comment-only file to NA.