[Examples] Fix and add old scenes (#17)

* add scenes

* add mesh

* Rename testShell6.scn to testShell2.scn

* Rename testShell6bis.scn to testShell2bis.scn

* Rename testShell7.scn to testShell3.scn

* Rename testShell7_small_bis.scn to testShell3_small_bis.scn

Cleanup the plugin and fix compilation (#12)

* Remove unnecessary includes to ConstantForceField.h

* Missing Sofa.Component.Mapping.Linear package

* sort lines

* cleaning dependencies

[CI] Update workflow to match branch name

Update versions of actions/download-artifact and actions/upload-artif…

…act (#5)

* Update versions of actions/download-artifact and actions/upload-artifact

* Update versions of actions/download-artifact and actions/upload-artifact

* update artifact name

* update download-artifact version

Fix and clean CMake and dependencies (#3)