SU2-preCICE adapter

This is a preCICE adapter for SU2 version 7.5.1 "Blackbird", including examples for conjugate heat transfer and fluid-structure interation simulations.

Read more in the documentation.

Note: In its current state, the SU2 adapter is using the Python wrapper of SU2. The previous implementation was directly editing the C++ source files of SU2. There is also a version relying on the Python wrapper that however works with preCICE v2.