feat: add analysis model objects

tests/model_object_main.cpp

@@ -0,0 +1,28 @@
+int run_boundary_base_tests();
+int run_element_base_tests();
+int run_load_base_tests();
+int run_material_base_tests();
+int run_mitc4_element_model_tests();
+int run_shell_property_tests();
+
+int main() {
+    if (const int result = run_boundary_base_tests(); result != 0) {
+        return result;
+    }
+    if (const int result = run_element_base_tests(); result != 0) {
+        return result;
+    }
+    if (const int result = run_mitc4_element_model_tests(); result != 0) {
+        return result;
+    }
+    if (const int result = run_material_base_tests(); result != 0) {
+        return result;
+    }
+    if (const int result = run_shell_property_tests(); result != 0) {
+        return result;
+    }
+    if (const int result = run_load_base_tests(); result != 0) {
+        return result;
+    }
+    return 0;
+}