* fix some "code smell"
   ran black
* try to use a more specific regex pattern

fix: delete PayPal that I don't use often

* fix format comments

- make sure that total count of files that need formatting align with the number of files listed
- respect all values of `lines-changed-only` when creating format comment

* ensure clang v12 is installed

Ubuntu-latest runners no longer ship with clang v12

* update pre-commit hooks

* replace pylint with ruff and fix docs/tests

* allow LGTM comment when no files checked or failed

* do not exit early if no files are checked

allows LGTM comment in such a case
fix unit test and comments.json debug output file

* ensure CACHE_PATH exists before doing anything

* tally format advice if file-annotations is false

applied in make_annotations()

* annotate tidy advice if file-annotations is on

found a bug where file-annotations=false & tidy advice was still posted

* modify log output to reflect count not annotations

* fix filename matching for tidy annotations

also adjust unit test to use a src that triggers tidy annotations