Add JCZN ESP32-2432S028R (CYD) board support (#85)

Author: Xylopyrographer

boards/jczn_2432s028r.json

@@ -0,0 +1,32 @@
+{
+  "build": {
+    "core": "esp32",
+    "extra_flags": "-DARDUINO_JCZN_2432S028R",
+    "f_cpu": "240000000L",
+    "f_flash": "40000000L",
+    "flash_mode": "qio",
+    "mcu": "esp32",
+    "variant": "jczn_2432s028r"
+  },
+  "connectivity": [
+    "wifi",
+    "bluetooth"
+  ],
+  "debug": {
+    "openocd_board": "esp-wroom-32.cfg"
+  },
+  "frameworks": [
+    "arduino",
+    "espidf"
+  ],
+  "name": "ESP32-2432S028R CYD",
+  "upload": {
+    "flash_size": "4MB",
+    "maximum_ram_size": 327680,
+    "maximum_size": 4194304,
+    "require_upload_port": true,
+    "speed": 460800
+  },
+  "url": "http://pan.jczn1688.com/directlink/1/ESP32%20module/2.8inch_ESP32-2432S028R.rar",
+  "vendor": "JCZN"
+}