feat(equation-and-linear-solve): step 0 — symmetric-csr-assembly

include/fesa/assembly/serial_assembler.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <fesa/assembly/equation_system.hpp>
+#include <fesa/fem/dof_manager.hpp>
+#include <fesa/model/domain.hpp>
+
+namespace fesa {
+
+[[nodiscard]] EquationSystem assemble_serial(
+    const Domain& domain,
+    const DofManager& dofs);
+
+}  // namespace fesa