fix doc omissions for `filesystem-change-evt`

Closes PR 14191

Merge to v6.0
fix #:make-docs? argument of `setup`

Closes PR 14193

Merge to v6.0
fix handling of choice evt returned by a guard evt

Closes PR 14195

Merge to v6.0
repair to package manager GUI

Thanks to Odegov Evgeny for the patch

Closes PR 14196
make pkg tests work more by setting PATH

Merge to v6.0
increase timeouts
Merge branch 'comment-reader-unsyntax' of github.com:bluephoenix47/racket into comment-reader-unsyntax
Merge branch 'comment-reader-unsyntax' of github.com:bluephoenix47/racket into comment-reader-unsyntax
* Changed parsing for #:escape-id to use a peeking-input-port.
  pkgs/scribble-pkgs/scribble-lib/scribble/comment-reader.rkt