[tools] Windwows: Well, provide shell scripts too

* proposed by crueter

Signed-off-by: Caio Oliveira <caiooliveirafarias0@gmail.com>

tools/windows/install-vulkan-sdk.ps1

@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 # SPDX-FileCopyrightText: 2023 yuzu Emulator Project
 # SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -10,16 +13,22 @@ if (-not ([bool](net session 2>$null))) {
 }
 
 $VulkanSDKVer = "1.4.328.1"
+$VULKAN_SDK = "C:/VulkanSDK/$VulkanSDKVer"
 $ExeFile = "vulkansdk-windows-X64-$VulkanSDKVer.exe"
 $Uri = "https://sdk.lunarg.com/sdk/download/$VulkanSDKVer/windows/$ExeFile"
 $Destination = "./$ExeFile"
 
+# Check if Vulkan SDK is already installed
+if (Test-Path $VULKAN_SDK) {
+    Write-Host "-- Vulkan SDK already installed at $VULKAN_SDK"
+    return
+}
+
 echo "Downloading Vulkan SDK $VulkanSDKVer from $Uri"
 $WebClient = New-Object System.Net.WebClient
 $WebClient.DownloadFile($Uri, $Destination)
 echo "Finished downloading $ExeFile"
 
-$VULKAN_SDK = "C:/VulkanSDK/$VulkanSDKVer"
 $Arguments = "--root `"$VULKAN_SDK`" --accept-licenses --default-answer --confirm-command install"
 
 echo "Installing Vulkan SDK $VulkanSDKVer"

tools/windows/install-vulkan-sdk.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/sh
+# SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+: "${VULKAN_SDK_VER:=1.4.328.1}"
+: "${VULKAN_SDK:=C:/VulkanSDK/$VULKAN_SDK_VER}"
+EXE_FILE="vulkansdk-windows-X64-$VULKAN_SDK_VER.exe"
+URI="https://sdk.lunarg.com/sdk/download/$VULKAN_SDK_VER/windows/$EXE_FILE"
+DESTINATION="./$EXE_FILE"
+
+if command -v cygpath >/dev/null 2>&1; then
+    VULKAN_ROOT_UNIX=$(cygpath -u "$VULKAN_SDK")
+else
+    VULKAN_ROOT_UNIX="$VULKAN_SDK"
+fi
+
+# Check if Vulkan SDK is already installed
+if [ -d "$VULKAN_ROOT_UNIX" ]; then
+    echo "-- Vulkan SDK already installed at $VULKAN_ROOT_UNIX"
+    exit 0
+fi
+
+echo "Downloading Vulkan SDK $VULKAN_SDK_VER from $URI"
+curl -L -o "$DESTINATION" "$URI"
+chmod +x "$DESTINATION"
+echo "Finished downloading $EXE_FILE"
+
+echo "Installing Vulkan SDK $VULKAN_SDK_VER..."
+"$DESTINATION" --root "$VULKAN_ROOT_UNIX" --accept-licenses --default-answer --confirm-command install
+
+echo "Finished installing Vulkan SDK $VULKAN_SDK_VER"
+
+# GitHub Actions integration
+if [ "${GITHUB_ACTIONS:-false}" = "true" ]; then
+    echo "VULKAN_SDK=$VULKAN_SDK" >> "$GITHUB_ENV"
+    echo "$VULKAN_SDK/bin" >> "$GITHUB_PATH"
+fi
+

tools/windows/load-msvc-env.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/sh
+# SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# shellcheck disable=SC2154
+CLPATH=$(cygpath -u "$VCToolsInstallDir\\bin\\Host${VSCMD_ARG_HOST_ARCH}\\${VSCMD_ARG_TGT_ARCH}")
+export PATH="$CLPATH:$PATH"