Topiary follows symlinks and "reifies" them, if it makes any changes

[Xophmeister]

Describe the bug
If topiary format is run in a directory that contain symlinks to files that need formatting, then Topiary will format the contents of the target and then replace the symlink with that formatted target (i.e., as a regular file).

To Reproduce

$ mkdir test
$ echo '  {  "foo":   "bar"} ' > test/foo.json
$ ln -s foo.json test/bar.json
$ ls -l test
total 4
lrwxrwxrwx 1 chris users  8 Jan 16 10:13 bar.json -> foo.json
-rw-r--r-- 1 chris users 22 Jan 16 10:13 foo.json
$ topiary format test
$ ls -l test
total 8
-rw------- 1 chris users 17 Jan 16 10:14 bar.json
-rw------- 1 chris users 17 Jan 16 10:14 foo.json

Expected behavior
Two options, perhaps controllable via a command line option:

1. Skip over symlinks (default)
2. Format any symlinks' targets, leaving the symlink intact

Environment

• OS name + version: NixOS 24.11
• Version of the code: 0.5.1

Additional context
A similar problem happens with hardlinks; that is, the link is broken. Unlike the symlink case, I'm not quite sure how this can be fixed.