Add merged binaries to release assets (#524)

Buildscripts/Flashing/merge.ps1

@@ -0,0 +1,26 @@
+param(
+    # "--chip esp32s3" is irrelevant, just need to be added, fallback to "esp32s3"
+    [string]$chip = "esp32s3"
+)
+
+if ($null -eq (Get-Command "esptool" -ErrorAction SilentlyContinue))
+{
+    Write-Host "Unable to find esptool in your path. Make sure you have Python installed and on your path. Then run `pip install esptool`."
+    exit 1
+}
+
+# Create merge command based on partitions
+$json = Get-Content .\Binaries\flasher_args.json -Raw | ConvertFrom-Json
+$jsonClean = $json.flash_files -replace '[\{\}\@\;]', ''
+$jsonClean = $jsonClean -replace '[\=]', ' '
+
+$mergeArgs = @('--chip', $chip, 'merge-bin', '--output', 'merged_binary.bin') + ($jsonClean -split '\s+' | Where-Object { $_ })
+Push-Location Binaries
+& esptool @mergeArgs
+$exitCode = $LASTEXITCODE
+Pop-Location
+
+if ($exitCode -ne 0) {
+    exit $exitCode
+}
+