compile git version into firmware

.gitignore

@@ -1,4 +1,5 @@
 *.DS_Store
 build
 .vscode
+/.idea/
 .pio

examples/OneOpenAir/OneOpenAir.ino

@@ -467,6 +467,8 @@ static void oneIndoorInit(void) {
 
   /** Show boot display */
   Serial.println("Firmware Version: " + ag->getVersion());
+  Serial.printf("Firmware version: %s\n", GIT_VERSION);
+
   oledDisplay.setText("AirGradient ONE",
                       "FW Version: ", ag->getVersion().c_str());
   delay(DISPLAY_DELAY_SHOW_CONTENT_MS);

platformio.ini

@@ -12,13 +12,13 @@
 platform = espressif32
 board = esp32-c3-devkitm-1
 framework = arduino
-build_flags = 
-	-DARDUINO_USB_CDC_ON_BOOT=1
-	-DARDUINO_USB_MODE=1
+build_flags = '-D ARDUINO_USB_CDC_ON_BOOT=1 -D ARDUINO_USB_MODE=1 -D GIT_VERSION=\\"'$(git describe --tags --always --dirty)'\\"'
 board_build.partitions = partitions.csv
 monitor_speed = 115200
 lib_deps = 
 	aglib=symlink://../arduino
 
+monitor_filters = time
+
 [platformio]
 src_dir = examples/OneOpenAir