Various Doc update following 2.0 change

[kerautret]

PR Description

Following the new display introduced from polyscope viewer, the illustrations of tools in the documentations was obsolete.
It also add some fix when reproducing examples.
Some links were also broken from the new organization.

By the way the tools update is also given :DGtal-team/dgtal.github.io#26

Checklist

• Doxygen documentation of the code completed (classes, methods, types, members...).
• Main tool doxygen documentation (following existing documentation of DGtalTools documentation.
• Check if it follows the tools structure described in CONTRIBUTING.md
• New entry in the ChangeLog.md added.
• Update the readme with potentially a screenshot of the tools if it applies.
• No warning raised in Debug cmake mode (otherwise, Github Actions C.I. will fail).
• All continuous integration tests pass (Github Actions).

[dcoeurjo]

whaou, impressed by the fact that you rerender all snaphots... 👏

[dcoeurjo]

thanks for the great PR

[kerautret]

whaou, impressed by the fact that you rerender all snaphots... 👏

Thank you, yes, the old screenshots were starting to look outdated from QT 🤣 looks more modern with polyscope ;)