ci: add Windows context-menu helper scripts to repo (required by portable zip build)

Author: bjlida

scripts/register-context-menu.ps1

@@ -0,0 +1,35 @@
+# Register "Open in GenCode" on folder/drive right-click (portable / manual install).
+# Run from the folder that contains gencode.exe, or pass -ExePath explicitly.
+
+param(
+    [string]$ExePath = (Join-Path $PSScriptRoot "gencode.exe")
+)
+
+$ErrorActionPreference = "Stop"
+
+if (-not (Test-Path -LiteralPath $ExePath)) {
+    Write-Error "gencode.exe not found: $ExePath"
+}
+
+$ExePath = (Resolve-Path -LiteralPath $ExePath).Path
+$quotedExe = "`"$ExePath`""
+$icon = "`"$ExePath`",0"
+$command = "$quotedExe `"%V`""
+
+$targets = @(
+    "HKCU:\Software\Classes\Directory\shell\OpenInGenCode",
+    "HKCU:\Software\Classes\Directory\Background\shell\OpenInGenCode",
+    "HKCU:\Software\Classes\Drive\shell\OpenInGenCode"
+)
+
+foreach ($base in $targets) {
+    New-Item -Path $base -Force | Out-Null
+    Set-ItemProperty -Path $base -Name "(default)" -Value "用 GenCode 打开"
+    Set-ItemProperty -Path $base -Name "Icon" -Value $icon
+    Set-ItemProperty -Path $base -Name "NoWorkingDirectory" -Value ""
+    New-Item -Path "$base\command" -Force | Out-Null
+    Set-ItemProperty -Path "$base\command" -Name "(default)" -Value $command
+}
+
+Write-Host "Registered context menu for: $ExePath"
+Write-Host "Right-click a folder in Explorer and choose '用 GenCode 打开'."

scripts/unregister-context-menu.ps1

@@ -0,0 +1,17 @@
+# Remove "Open in GenCode" Explorer context menu entries.
+
+$ErrorActionPreference = "Stop"
+
+$targets = @(
+    "HKCU:\Software\Classes\Directory\shell\OpenInGenCode",
+    "HKCU:\Software\Classes\Directory\Background\shell\OpenInGenCode",
+    "HKCU:\Software\Classes\Drive\shell\OpenInGenCode"
+)
+
+foreach ($base in $targets) {
+    if (Test-Path -LiteralPath $base) {
+        Remove-Item -LiteralPath $base -Recurse -Force
+    }
+}
+
+Write-Host "Removed GenCode Explorer context menu entries."