include `sofa/core/fwd.h` instead of the forward declaration (#575)

include `sofa/core/fwd.h` instead of the forward declaration (#575)

Update cachix/install-nix-action to version 31

[CI] Update workflow to match branch name (#563)

[CI] Update workflow to match branch name

Fix by passing state link when using other topology than edges (#550)

[examples] Simplify use of ImGui (#525)

* [examples] Simplify use of ImGui

* Fix liver-scriptcontroller

---------

Co-authored-by: Paul Baksic <paul.baksic@outlook.fr>

Fix legacy version passed (#523)

Update version in package.nix

Update version to v25.06

Apply suggestions from code review

Co-authored-by: Hugo <hugo.talbot@sofa-framework.org>