Extrospector and Interoceptor both inherit from Sensor now

hcore/include/sensors/sensor.h

@@ -3,17 +3,19 @@
 
 #include <cstdint>
 
+namespace hk {
+namespace sensors {
+
 class Sensor
 {
 public:
-    Sensor(uint32_t _id, uint32_t _value = 0)
-    : id(_id), value(_value)
-    {}
+    Sensor() = default;
     ~Sensor() = default;
 
 public:
-    uint32_t id;
-    uint64_t value;
 };
 
+} // namespace sensors
+} // namespace hk
+
 #endif // _SENSOR_H