Add prebuilt firmware package

firmware/flash.ps1

@@ -0,0 +1,30 @@
+param(
+    [Parameter(Mandatory = $true, Position = 0)]
+    [string]$Port
+)
+
+$ErrorActionPreference = "Stop"
+$FirmwareDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+
+Write-Host "Keep the RD-03D external 5 V supply OFF while flashing."
+
+$EsptoolArgs = @(
+    "-m", "esptool",
+    "--chip", "esp32s3",
+    "--port", $Port,
+    "--baud", "460800",
+    "--before", "default_reset",
+    "--after", "hard_reset",
+    "write_flash",
+    "--flash_mode", "dio",
+    "--flash_freq", "80m",
+    "--flash_size", "4MB",
+    "0x0", (Join-Path $FirmwareDir "bootloader.bin"),
+    "0x8000", (Join-Path $FirmwareDir "partition-table.bin"),
+    "0x10000", (Join-Path $FirmwareDir "radick.bin")
+)
+
+& python @EsptoolArgs
+if ($LASTEXITCODE -ne 0) {
+    exit $LASTEXITCODE
+}