Add documentation for new constructors and operators

Author: sebromero

src/ArduinoCellular.h

@@ -108,12 +108,28 @@ class ArduinoCellular {
          */
         ~ArduinoCellular();
 
-        // Delete copy operations (since unique_ptr can't be copied)
+        /**
+         * @brief Deleted copy constructor and assignment operator to prevent copying.
+         * unique_ptr is used to manage the lifetime of the clients but they cannot be copied.
+         */
         ArduinoCellular(const ArduinoCellular&) = delete;
+
+        /**
+         * @brief Deleted assignment operator to prevent copying.
+         * unique_ptr is used to manage the lifetime of the clients but they cannot be copied.
+         */
         ArduinoCellular& operator=(const ArduinoCellular&) = delete;
 
-        // Enable move operations
+        /**
+         * @brief Move constructor for the ArduinoCellular class.
+         * Allows moving the instance to another instance.
+         */
         ArduinoCellular(ArduinoCellular&&) = default;
+
+        /**
+         * @brief Move assignment operator for the ArduinoCellular class.
+         * Allows moving the instance to another instance.
+         */
         ArduinoCellular& operator=(ArduinoCellular&&) = default;
 
         /**