feat(SpectralSolver): Spectral Solver now works in a limited fashion

Major work on spectral solver, can now evolve up to about a year. At
that point we likely need to impliment repartitioning logic to stabalize
the network or some other scheme based on the jacobian structure

src/include/gridfire/utils/macros.h

@@ -0,0 +1,9 @@
+#pragma once
+
+
+#if defined(GF_USE_OPENMP)
+    #define GF_OMP_PRAGMA(x) _Pragma(#x)
+    #define GF_OMP(omp_args, _) GF_OMP_PRAGMA(omp omp_args)
+#else
+    #define GF_OMP(_,fallback_args) fallback_args
+#endif