Correct the dimension of the rotation and the deformation in the compositeBasis, it needs to be 3, independent of dim

Add missing ADOLC scalar mode in mixedlocalgfeadolcstiffness

See merge request !116

Fix build failure related to ProductManifold and std::cout

See merge request !114

In particular:
* Forward declaring ProductManifold in the `impl` namespace
  is not a good idea.
* Add missing headers

targetspacetest.cc is extended to test for the first issue.

Add embedded interpolation option in localprojectedfefunction.hh

See merge request !109

Remove old dune-fufem bases

See merge request !108

2.7 is simply too old now.  We could even go straight for 2.9,
but let's try how far we get with 2.8.  That one is in current
Ubuntu and Debian releases.

Using FieldMatrix<,1,1> for scalars has been the standard Dune way
for a long time, but since dune 2.7 using scalars directly works
just as well.

They are getting removed now for good after the release of
dune-fufem 2.9.  The code that replaces them has been there
for quite a while, and therefore we can simply use it
without having to worry about compatibility with older
dune-fufem versions.

.gitlab-ci.yml: update URL of dune-elasticity repository

See merge request !106

Adjust address to dune-elasticity in .gitlab-ci.yml

See merge request !107

convert file to UTF-8 encoding

See merge request !105

Enable the proximal newton solver in simofoxshell

See merge request !102

fix build failures with GCC 12 and without IPopt

See merge request !103

use `getCommunication()` instead of `getCollectiveCommunication()`

See merge request !104

This fixed the following error when building with GCC 12.1.0-8 (Debian):

```
/src/dune-gfe/dune/gfe/rotation.hh:225:42: error: invalid declarator before 'axis'
  225 |     Rotation<T,3>(Dune::FieldVector<T,3> axis, T angle)
      |                                          ^~~~
/src/dune-gfe/dune/gfe/rotation.hh:225:41: error: expected ')' before 'axis'
  225 |     Rotation<T,3>(Dune::FieldVector<T,3> axis, T angle)
      |                  ~                      ^~~~~
      |                                         )
```

[CI] Run the 'codespell' as part of CI

See merge request !101

replace `enum` with `constexpr static int`

See merge request !100

Only include the multiplication of a ScaledIdentityMatrix with another...

See merge request !99

Only include the multiplication of a ScaledIdentityMatrix with another FieldMatrix if dune common is older or equal 2.8

Replace traceSquared(sym(.)) by traceSquared(.) as it is the same

See merge request !98

Miscellaneous modernization

See merge request !96