Add board ESP32-S3 PowerFeather (platformio#1344)

Author: powerfeatherdev

boards/esp32s3_powerfeather.json

@@ -0,0 +1,48 @@
+{
+  "build": {
+    "arduino":{
+      "partitions": "default_8MB.csv"
+    },
+    "core": "esp32",
+    "extra_flags": [
+      "-DARDUINO_ESP32S3_POWERFEATHER",
+      "-DARDUINO_USB_CDC_ON_BOOT=1",
+      "-DARDUINO_RUNNING_CORE=1",
+      "-DARDUINO_EVENT_RUNNING_CORE=1"
+    ],
+    "f_cpu": "240000000L",
+    "f_flash": "80000000L",
+    "flash_mode": "qio",
+    "hwids": [
+      [
+        "0X303A",
+        "0x81BB"
+      ]
+    ],
+    "mcu": "esp32s3",
+    "variant": "esp32s3_powerfeather"
+  },
+  "connectivity": [
+    "bluetooth",
+    "wifi"
+  ],
+  "debug": {
+    "openocd_target": "esp32s3.cfg"
+  },
+  "frameworks": [
+    "arduino",
+    "espidf"
+  ],
+  "name": "ESP32-S3 PowerFeather",
+  "upload": {
+    "flash_size": "8MB",
+    "maximum_ram_size": 327680,
+    "maximum_size": 8388608,
+    "wait_for_upload_port": true,
+    "require_upload_port": true,
+    "speed": 460800
+  },
+  "url": "https://powerfeather.dev/",
+  "vendor": "PowerFeather"
+}
+