Add custom board definition with Launchpad X VID/PID (0x1235/0x0103)

- boards/launchpad_x_variant.json defines custom board
- platformio.ini uses custom board
- Board sets VID/PID at hardware level

boards/launchpad_x_variant.json

@@ -0,0 +1,43 @@
+{
+  "build": {
+    "arduino": {
+      "memory_type": "qio_opi",
+      "usb_mode": 0,
+      "usb_cdc_on_boot": 1,
+      "use_tinyusb": 1,
+      "vid": "0x1235",
+      "pid": "0x0103"
+    },
+    "core": "esp32",
+    "extra_flags": "-DARDUINO_USB_MODE=0 -DARDUINO_USB_CDC_ON_BOOT=1 -DUSE_TINYUSB=1",
+    "f_cpu": "240000000L",
+    "f_flash": "80000000L",
+    "flash_mode": "qio",
+    "mcu": "esp32s3",
+    "partitions": "default_8MB.csv"
+  },
+  "connectivity": [
+    "usb"
+  ],
+  "debug": {
+    "openocd_board": "esp32-s3-devkitc-1"
+  },
+  "frameworks": [
+    "arduino"
+  ],
+  "name": "Loopy MIDI Controller (Launchpad X VID/PID)",
+  "upload": {
+    "flash_size": "8MB",
+    "maximum_ram_size": 512000,
+    "maximum_size": 8388608,
+    "protocol": "esptool",
+    "protocols": [
+      "esptool",
+      "espota"
+    ],
+    "require_upload_port": true,
+    "speed": 460800
+  },
+  "url": "https://gitea.jackofclubs.com.au/ash/loopy_midi_controller",
+  "vendor": "Ash"
+}

platformio.ini

@@ -3,8 +3,15 @@
 
 [env:esp32s3]
 platform = espressif32
-board = esp32-s3-devkitc-1
-framework = arduino
+board = launchpad_x_variant
+board_build.arduino.memory_type = qio_opi
+board_build.partitions = default_8MB.csv
+board_build.arduino.vid = 0x1235
+board_build.arduino.pid = 0x0103
+board_build.arduino.usb_mode = 0
+board_build.arduino.usb_cdc_on_boot = 1
+board_build.arduino.use_tinyusb = 1
+
 lib_deps =
     adafruit/Adafruit TinyUSB Library@3.1.0
     fastled/FastLED@^3.9.0
@@ -12,12 +19,4 @@ lib_deps =
 build_unflags =
     -DARDUINO_USB_MODE=1
 
-build_flags =
-    -DARDUINO_USB_MODE=0
-    -DARDUINO_USB_CDC_ON_BOOT=1
-    -DUSE_TINYUSB=1
-
 monitor_speed = 115200
-
-board_build.partitions = default_8MB.csv
-board_build.arduino.memory_type = qio_opi