feat(station-g1): initial support for station g1

it boots, and is configurable over usb/radio

it's screaming about i2c issues in the console (likely no rtc, or gps pins
are wrong or something?)

more to come...

boards/station-g1.json

@@ -0,0 +1,39 @@
+{
+  "build": {
+    "arduino": {
+      "ldscript": "esp32.ld"
+    },
+    "core": "esp32",
+    "extra_flags": [
+	    "-D RADIOLIB_DEBUG=1"
+    ],
+    "f_cpu": "240000000L",
+    "f_flash": "40000000L",
+    "flash_mode": "dio",
+    "mcu": "esp32",
+    "variant": "esp32"
+  },
+  "connectivity": [
+    "wifi"
+  ],
+  "debug": {
+    "default_tool": "esp-builtin",
+    "onboard_tools": [
+      "esp-builtin"
+    ],
+    "openocd_target": "esp32.cfg"
+  },
+  "frameworks": [
+    "arduino"
+  ],
+  "name": "BQ Station G1",
+  "upload": {
+    "flash_size": "4MB",
+    "maximum_ram_size": 327680,
+    "maximum_size": 4194304,
+    "require_upload_port": true,
+    "speed": 460800
+  },
+  "url": "https://www.uniteng.com/wiki/doku.php?id=meshtastic:station",
+  "vendor": "BQ Consulting"
+}