Add windows install scripts

uninstall-windows-task.ps1

@@ -0,0 +1,74 @@
+[CmdletBinding()]
+param(
+  [Alias('keep-config')]
+  [switch]$KeepConfig
+)
+
+$ErrorActionPreference = 'Stop'
+
+$ServiceName = "luxtools-client"
+$TaskName = $ServiceName
+
+function Write-Usage {
+  @"
+Usage:
+  uninstall-windows-task.bat [--keep-config]
+
+Uninstalls $ServiceName Scheduled Task and removes installed files.
+
+Options:
+  --keep-config   Keep %LOCALAPPDATA%\$ServiceName\config.json on disk.
+"@ | Write-Host
+}
+
+# Allow -h/--help as positional args (PowerShell doesn't treat these as built-in).
+foreach ($a in @($args)) {
+  if ($a -eq '-h' -or $a -eq '--help') {
+    Write-Usage
+    exit 0
+  }
+}
+
+$installDir = Join-Path $env:LOCALAPPDATA $ServiceName
+$exePath = Join-Path $installDir "$ServiceName.exe"
+$configPath = Join-Path $installDir "config.json"
+
+# Stop task and any running instance (best-effort).
+try { Stop-ScheduledTask -TaskName $TaskName -ErrorAction SilentlyContinue | Out-Null } catch {}
+try { schtasks.exe /End /TN $TaskName 2>$null | Out-Null } catch {}
+
+try {
+  $procs = Get-Process -Name $ServiceName -ErrorAction SilentlyContinue
+  foreach ($p in $procs) {
+    try {
+      if ($p.Path -and (Split-Path -Path $p.Path -Resolve) -ieq (Split-Path -Path $exePath -Resolve)) {
+        Stop-Process -Id $p.Id -Force -ErrorAction SilentlyContinue
+      }
+    } catch {}
+  }
+} catch {}
+
+# Remove task (best-effort).
+try { Unregister-ScheduledTask -TaskName $TaskName -Confirm:$false -ErrorAction SilentlyContinue | Out-Null } catch {}
+try { schtasks.exe /Delete /TN $TaskName /F 2>$null | Out-Null } catch {}
+
+# Remove files.
+if (Test-Path -LiteralPath $installDir) {
+  if ($KeepConfig) {
+    # Remove everything except config.json
+    Get-ChildItem -LiteralPath $installDir -Force | ForEach-Object {
+      if ($_.FullName -ieq $configPath) { return }
+      try {
+        Remove-Item -LiteralPath $_.FullName -Recurse -Force -ErrorAction SilentlyContinue
+      } catch {}
+    }
+    # If directory became empty except config, keep it.
+  } else {
+    try { Remove-Item -LiteralPath $installDir -Recurse -Force -ErrorAction SilentlyContinue } catch {}
+  }
+}
+
+Write-Host "Uninstalled $ServiceName."
+if ($KeepConfig) {
+  Write-Host "Kept config file: $configPath"
+}