Bug: Missing formatting to string for structure classes

[Paebbels]

When calling pyVersioning variables, structure classes aren't formatted to a string.

C:\Git\GitHub\Paebbels\pyVersioning [dev ≡ +1 ~2 -0 | +2 ~5 -0 !]> pyVersioning.exe variables
project                 :  -  v0.0.0
  name                  :
  variant               :
  version               : v0.0.0
build                   : <pyVersioning.Build object at 0x000001F3FF7F46C0>
  date                  : 2025-04-21
  time                  : 10:43:02.882194
  compiler              : <pyVersioning.Compiler object at 0x000001F3819B63E0>
    name                :
    version             : v0.0.0
    configuration       :
    options             :
version                 : v0.0.0
tool                    : pyVersioning 0.17.0
  name                  : pyVersioning
  version               : 0.17.0
git                     : <pyVersioning.Git object at 0x000001F3819F5260>
  commit                : <pyVersioning.Commit object at 0x000001F3819DA920>
    hash                : 4f5b03b202887cab53ad27d80b0ed5bde028d705
    date                : 2025-04-21
    time                : 07:50:48
    author              : Patrick Lehmann <Paebbels@gmail.com>
      name              : Patrick Lehmann
      email             : Paebbels@gmail.com
    committer           : Patrick Lehmann <Paebbels@gmail.com>
      name              : Patrick Lehmann
      email             : Paebbels@gmail.com
    comment             : Fixed binary output check.

    oneline             : Fixed binary output check.
  reference             : dev
  tag                   :
  branch                : dev
  repository            : git@github.com:Paebbels/pyVersioning.git
env                     : Environment(............................................)
platform                : <pyVersioning.Platform object at 0x000001F3FF441510>
  ci_service            : NO-CI