Speed up runspace and tab initialization (#4793)

* Add startup performance tracing

* Lazy initialize non-default tabs

* Render install app entries incrementally

* Defer and cache toggle status checks

* Clean up runspace invocation ownership

* Defer GUI runspace pool startup

* Defer status taskbar asset rendering

* Record final speed verification

* Fix deferred install render timer callback

* Add dispatcher smoke coverage for install rendering

* Replace install render timer with dispatcher callbacks

* Gate performance tracing behind compile switch

* Clean up analyzer warnings in speed changes

* Speed up runspace and tab initialization

functions/private/Initialize-WinUtilTaskbarOverlayAssets.ps1

@@ -0,0 +1,21 @@
+function Initialize-WinUtilTaskbarOverlayAssets {
+    param(
+        [bool]$IncludeLogo = $true,
+        [bool]$IncludeStatusAssets = $true
+    )
+
+    if ($IncludeLogo -and -not $sync["logorender"]) {
+        $sync["logorender"] = (Invoke-WinUtilAssets -Type "Logo" -Size 90 -Render)
+        Write-WinUtilPerformanceCheckpoint -Name "Taskbar logo asset rendered"
+    }
+
+    if ($IncludeStatusAssets -and -not $sync["checkmarkrender"]) {
+        $sync["checkmarkrender"] = (Invoke-WinUtilAssets -Type "checkmark" -Size 512 -Render)
+        Write-WinUtilPerformanceCheckpoint -Name "Taskbar checkmark asset rendered"
+    }
+
+    if ($IncludeStatusAssets -and -not $sync["warningrender"]) {
+        $sync["warningrender"] = (Invoke-WinUtilAssets -Type "warning" -Size 512 -Render)
+        Write-WinUtilPerformanceCheckpoint -Name "Taskbar warning asset rendered"
+    }
+}