Selected changes from the last release (2023S)

New features
* tree stepping for harmonic simulations (5944efb1)
* LinFlowMech Mortar coupling (c3c14b60)
* FixedPointSimple Nonlinear solution (068efa25)
* Interface for external SGP optimizer (f8c64aa7)
* viscous dissipation power (LinFlowPDE) (e96da433)
* storage of left eigenvectors to hdf5 file in eigenValue analysis (4561b0bb)
* saving of eigenvalues to info.xml (6679e032)
* custom search contour for FEAST (5280116f)
* acceleration BC for WaterWavePDE (278de5a1)
* WaterWavePDE postprocessing results: sirface traction, reaction force and torque (34f73da9, e63bff4d, 803376e3)
* CDB reader can now handle "thermal solid elements" (element 278 and 279) (ee5af1c5)
* Curvilinear PML and an automatic layer generation algorithm (9f79019e)

Bugfixes (selected)
* Fixed the L2norm postproc-result for harmonic computations (0895c14b)
* Left eigenvectors for FEST solver (cc88723b)

Developer notes
* added JUnit information in pipeline (f5656866)
* tags in testsuite and major pipleine restructuring (73a3f23d, 5115e418, 9c45d38f, fdcbd94d)
* new cfsdeps structure
* Eigen is now available via cfsdeps (864a5868)

Breaking changes
* remove legacy gmv reader/writer (dea55f4c)
* Introduce material definition for smoothPDE (b4ac0859)

Version to be used in courses of 2023 winter term