[Windows] Rework flutter build helper

windows/build-installer.ps1

@@ -3,7 +3,20 @@ $buildNumber = "$(Get-Date -Format 'yyyyMMddHHmmss')"
 
 cd $PSScriptRoot
 
+# Define the file path and the new version value
+$issTplFile = "./busylight-buddy-windows-installer-builder.iss.tpl"
+$issFile = "./busylight-buddy-windows-installer-builder.iss"
+
+# Read the content of the file
+$content = Get-Content -Path $issTplFile -Raw
+
+# Replace the placeholder with the new version value
+$updatedContent = $content -replace '%%MyAppVersion%%', $buildName
+
+# Write the updated content back to the file
+$updatedContent | Set-Content -Path $issFile
+
 # Build the Windows application using Flutter
 flutter build windows --build-name=$buildName --build-number=$buildNumber
 # Build the Windows installer using Inno Setup Compiler (ISCC.exe)
-ISCC.exe ./busylight-buddy-windows-installer-builder.iss
+ISCC.exe $issFile