Start: Add option to not install wheels

Building from source is a case for many wheels, so add an option
to skip wheel upgrades/installation if the user uses the start script.

Signed-off-by: kingbri <bdashore3@proton.me>

start.ps1

@@ -1,6 +1,7 @@
 # Arg parsing
 param(
     [switch]$ignore_upgrade = $false,
+    [switch]$nowheel = $false,
     [switch]$activate_venv = $false
 )
 
@@ -12,6 +13,12 @@ function GetRequirementsFile {
         exit
     }
 
+    # Install nowheel if specified
+    if ($nowheel) {
+        Write-Output "Not installing wheels due to user request."
+        return "requirements-nowheel"
+    }
+
     $CudaPath = $env:CUDA_PATH
     $CudaVersion = Split-Path $CudaPath -Leaf