feat(libmeanfield): centrifugal + pressure

libmeanfield/interface/operators/kernels/pressure_force_kernels.cppm

@@ -0,0 +1,20 @@
+module;
+
+#include <mfem.hpp>
+
+export module mean_field:operators.kernels.pressure_force;
+
+export import :fem;
+export import :mapping.domain_mapper;
+export import :physics.barotrope;
+
+export namespace mean_field::operators::kernels {
+    void apply_pressure_force_residual(
+        const fem::FEM &f,
+        const mapping::DomainMapperStateless &domainMapper,
+        const physics::PolytropicBarotrope &barotrope,
+        const mfem::Vector &enthalpyTrue,
+        const mfem::Vector &displacementTrue,
+        mfem::Vector &residualTrue
+    );
+} // namespace mean_field::operators::kernels