feat(mean_field): added dimensions, discritization, and start of eos

The full rewrite of mean_field into something maintainable is progressing. dimensions is mostly done, discritization (domain, blocks, and fields) is done, and eos is progressing quickly

tests/sandbox/finite_sandbox.cpp

@@ -0,0 +1,26 @@
+#include "serif/utils/misc/finite.hpp"
+#include <limits>
+
+enum class [[maybe_unused]] TestErrorCode {
+    NotFinite
+};
+
+namespace {
+    class test_exception : public std::runtime_error {
+    public:
+        test_exception(TestErrorCode error_code, const std::string& message)
+            : std::runtime_error(message), m_error_code(error_code) {}
+
+        TestErrorCode error_code() const noexcept {
+            return m_error_code;
+        }
+    private:
+        TestErrorCode m_error_code;
+    };
+}
+
+int main() {
+    double a = std::numeric_limits<double>::infinity();
+
+    serif::utils::misc::validate_finite<test_exception>(a, TestErrorCode::NotFinite);
+}