Add hardware support for GPS, MAX7219, BME280, and MQ7 sensors

- Implemented GPS functionality with initialization and reading latitude and longitude.
- Added MAX7219 display support, including initialization, text display, animation control, and brightness settings.
- Integrated BME280 sensor for reading temperature, pressure, and humidity.
- Developed MQ7 sensor interface for reading gas concentration values.
- Created HTTP client for GET and POST requests.
- Implemented MQTT client for message handling and connection management.
- Added JSON serialization and deserialization functions for sensor and actuator data.
- Established WiFi connection setup for network communication.

hardware/src/lib/sensor/MQ7.cpp

@@ -0,0 +1,30 @@
+#include "MQ7.hpp"
+
+void MQ7_Init()
+{
+    pinMode(DIGITAL_MQ7, INPUT);
+    pinMode(ANALOG_MQ7, INPUT);
+}
+ 
+void MQ7_Read(float &sensorVolt, float &RSAir, float &R0, float &sensorValue)
+{
+    analogWrite(ANALOG_MQ7, 1023);
+    delay(60000);
+    analogWrite(ANALOG_MQ7, (1023/5)*1.4 );
+
+    for(int i = 0; i<100; i++)
+    { 
+        sensorValue = sensorValue + analogRead(ANALOG_MQ7);
+        delay(90000);
+    }
+
+    sensorValue = sensorValue/100.0;
+    sensorVolt = sensorValue/1024*5.0;
+    RSAir = (5.0-sensorVolt)/sensorVolt;
+    R0 = RSAir/(26+(1/3));
+
+    Serial.print("R0 = ");
+    Serial.println(R0);
+
+    delay(1000);
+}