added ProximitySwitch class

libs/sensors/include/ProximitySwitch.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include "Sensor.h"
+#include "mbed.h"
+
+namespace Sensor {
+    class ProximitySwitch final : Sensor {
+        public:
+         ProximitySwitch(PinName proximity_in);
+
+        //read returns 1 for HIGH, and 0 for LOW
+        float read() override{};
+        float alternateRead() override{};
+        bool getStatus() const override{};
+        [[nodiscard]] bool reset() override;
+        [[nodiscard]] bool update() override;
+
+        private:
+         AnalogIn m_proximity_in_adc;
+    };
+}  // namespace Sensor

libs/sensors/src/ProximitySwitch.cpp

@@ -0,0 +1,14 @@
+#include "ProximitySwitch.h"
+
+using namespace Sensor;
+
+ProximitySwitch::ProximitySwitch(PinName proximity_in) : m_proximity_in_adc(proximity_in) {}
+
+
+/*https://www.dfrobot.com/product-2025.html*/
+float ProximitySwitch::read()
+{
+  float proximity_reading = m_proximity_in_adc.read();
+
+  return proximity_reading;
+}