Use make_linter_from_xpath() to generate simple linters

[MichaelChirico]

Follow-up to #2126 to demonstrate utility within our suite.

[MichaelChirico]

Draft while #2126 is pending since the diff base is unclear --> harder to review

[MichaelChirico]

somewhat surprisingly roxygen2 uses C sorting -> aaa.R was coming after T_and_F_symbol_linter.R, which seems unintentional. Hence the name change.

[codecov-commenter]

Codecov Report

Merging #2128 (7a6b466) into main (4a42798) will decrease coverage by 0.02%.
The diff coverage is n/a.

❗ Current head 7a6b466 differs from pull request most recent head 4cc66ec. Consider uploading reports for the commit 4cc66ec to get more accurate results

@@            Coverage Diff             @@
##             main    #2128      +/-   ##
==========================================
- Coverage   99.65%   99.64%   -0.02%     
==========================================
  Files         121      111      -10     
  Lines        5260     5097     -163     
==========================================
- Hits         5242     5079     -163     
  Misses         18       18              

see 9 files with indirect coverage changes

[IndrajeetPatil]

So cool!!

Thanks for introducing this helper.