Add precipitation_intensity sensor device class (#14027)

src/common/const.ts

@@ -57,6 +57,7 @@ import {
   mdiVideo,
   mdiWaterPercent,
   mdiWeatherCloudy,
+  mdiWeatherPouring,
   mdiWeight,
   mdiWhiteBalanceSunny,
   mdiWifi,
@@ -143,6 +144,7 @@ export const FIXED_DEVICE_CLASS_ICONS = {
   pm25: mdiMolecule,
   power: mdiFlash,
   power_factor: mdiAngleAcute,
+  precipitation_intensity: mdiWeatherPouring,
   pressure: mdiGauge,
   reactive_power: mdiFlash,
   signal_strength: mdiWifi,