chore: add Windows build and service scripts

scripts/build.ps1

@@ -0,0 +1,31 @@
+param(
+  [string]$OutputDir = "dist",
+  [string]$BinaryName = "lingma-ipc-proxy.exe",
+  [switch]$Clean
+)
+
+$ErrorActionPreference = "Stop"
+
+$repoRoot = Split-Path -Parent $PSScriptRoot
+$distDir = Join-Path $repoRoot $OutputDir
+$binaryPath = Join-Path $distDir $BinaryName
+
+if ($Clean -and (Test-Path $distDir)) {
+  Remove-Item -Recurse -Force $distDir
+}
+
+New-Item -ItemType Directory -Force $distDir | Out-Null
+
+Push-Location $repoRoot
+try {
+  $env:CGO_ENABLED = "0"
+  $env:GOOS = "windows"
+  $env:GOARCH = "amd64"
+
+  Write-Host "Building $binaryPath"
+  go build -trimpath -ldflags "-s -w" -o $binaryPath .\cmd\lingma-ipc-proxy
+  Write-Host "Build completed: $binaryPath"
+}
+finally {
+  Pop-Location
+}