feat: add property model foundation

tests/property/property_base_test.cpp

@@ -0,0 +1,37 @@
+#include "fesa/property/Property.hpp"
+
+#include <memory>
+
+namespace {
+
+int require(bool condition) {
+    return condition ? 0 : 1;
+}
+
+class TestProperty final : public fesa::property::Property {
+public:
+    explicit TestProperty(fesa::core::PropertyId id) : id_(id) {}
+
+    fesa::core::PropertyId id() const noexcept override {
+        return id_;
+    }
+
+    fesa::property::PropertyKind kind() const noexcept override {
+        return fesa::property::PropertyKind::Shell;
+    }
+
+private:
+    fesa::core::PropertyId id_;
+};
+
+} // namespace
+
+int run_property_base_tests() {
+    std::unique_ptr<fesa::property::Property> owned = std::make_unique<TestProperty>(500);
+    const fesa::property::Property& property = *owned;
+
+    if (const int result = require(property.id() == 500); result != 0) {
+        return result;
+    }
+    return require(property.kind() == fesa::property::PropertyKind::Shell);
+}