Add serial log levels

firmware/esp32/xterra-controller/logger.cpp

@@ -0,0 +1,19 @@
+#include "logger.h"
+
+LogLevel currentLogLevel = LOG_INFO;
+
+void setLogLevel(LogLevel level) {
+    currentLogLevel = level;
+}
+
+void logInfo(const String& message) {
+    if (currentLogLevel >= LOG_INFO) {
+        Serial.println(message);
+    }
+}
+
+void logDebug(const String& message) {
+    if (currentLogLevel >= LOG_DEBUG) {
+        Serial.println(message);
+    }
+}