feat(equations): Loads of simple getters

The continuation and snapshotting systems needed more getters in order to reliably serialize a model. Added those getters

src/include/serif/equations/equations.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+/**
+ * @file equations.hpp
+ * @author Emily M. Boudreaux
+ *
+ * @brief File containing the equations module. This module contains the equations used in the SERiF framework.
+ */
+
+//TODO: Add a detailed worked example here
+namespace serif::equations {}
+
+#include "serif/equations/angular_momentum.hpp"
+#include "serif/equations/arithmetic.hpp"
+#include "serif/equations/barotropic_closure.hpp"
+#include "serif/equations/centering.hpp"
+#include "serif/equations/central_density.hpp"
+#include "serif/equations/concepts.hpp"
+#include "serif/equations/contributions.hpp"
+#include "serif/equations/displacement_force.hpp"
+#include "serif/equations/gravity_force.hpp"
+#include "serif/equations/hydrostatic_equilibrium.hpp"
+#include "serif/equations/mass_normalization.hpp"
+#include "serif/equations/mixed_gravity.hpp"
+#include "serif/equations/point.hpp"
+#include "serif/equations/pressure_force.hpp"
+#include "serif/equations/registry.hpp"
+#include "serif/equations/rigid_rotation.hpp"
+#include "serif/equations/rotational_force.hpp"