feat(solver/normalization): Added normalization system

The dynamical range of different fields SERiF must solve for is massive. This just breaks any reasonable preconditioner / spreads the eigen modes of the system matrix out. This is a normalization system which uses charectaristic scale factors (e.g. the approximate radius estimated using the lane-emden equation) to rescale different fields to a more similar numeric scale. This turns out to be essential for stable convergence. Broadly this implements Riesz normalization along with exact diagnoal normalization.

src/include/serif/solver/normalization/layout.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "serif/discretization/blocks/system_layout.hpp"
+
+namespace serif::solver::normalization
+{
+    /** @brief Compatibility spelling for the shared discretization layout. */
+    template <utils::dependencies::IsKeyList Values, utils::dependencies::IsKeyList Residuals>
+    using CoordinateLayout = discretization::blocks::SystemLayout<Values, Residuals>;
+
+    /** @brief Normalization consumes the same coordinate representation as physical operators and solvers. */
+    template <typename Candidate>
+    concept CoordinateLayoutType = discretization::blocks::SystemLayoutType<Candidate>;
+}