Enhance SandwichReminder-AutoOrder feature with direct checkout navigation and improved logic

- Added new configuration options for direct checkout navigation, including `useDirectCheckoutNavigation`, `checkoutPath`, and `checkoutOpenDelayMs`.
- Updated the auto-order flow to navigate directly to the checkout page, skipping the mini-cart and date/time steps.
- Improved keyboard automation logic for item remark and order confirmation processes.
- Removed the old SandwichAutoOrder.ps1 file as its functionality has been integrated into SandwichReminder-AutoOrder.ps1.
- Introduced a new runner-launcher.vbs to start the runner.ps1 without a visible console window, ensuring WinForms dialogs can appear.
- Implemented a mutex mechanism in runner.ps1 to prevent concurrent execution of the same feature.

internal/features/SandwichReminder.ps1

@@ -127,6 +127,17 @@ function Invoke-Feature {
 
             if ($autoOrderConfig -and $autoOrderConfig['enabled']) {
                 Write-Log -Level Info -Message 'SandwichReminder-AutoOrder is enabled; running auto-order flow.' -Feature 'SandwichReminder'
+
+                if (-not (Get-Command -Name Invoke-SandwichAutoOrderFlow -ErrorAction SilentlyContinue)) {
+                    $autoOrderFeaturePath = Join-Path $PSScriptRoot 'SandwichReminder-AutoOrder.ps1'
+                    if (Test-Path $autoOrderFeaturePath) {
+                        . $autoOrderFeaturePath
+                    }
+                    else {
+                        throw "Auto-order feature module not found at '$autoOrderFeaturePath'."
+                    }
+                }
+
                 [void](Invoke-SandwichAutoOrderFlow -AutoOrderConfig $autoOrderConfig -FallbackUrl $Config['url'])
             }
             else {