some more progress

scripts/helpers/misc.psm1

@@ -0,0 +1,20 @@
+function Get-ScriptRepoRoot {
+    $currentPath = $PSScriptRoot
+    while ($currentPath -ne $null -and $currentPath -ne "")
+	{
+        if (Test-Path (Join-Path $currentPath ".git")) {
+            return $currentPath
+        }
+        # Also check for .git file which indicates a submodule
+        $gitFile = Join-Path $currentPath ".git"
+        if (Test-Path $gitFile -PathType Leaf)
+		{
+            $gitContent = Get-Content $gitFile
+            if ($gitContent -match "gitdir: (.+)") {
+                return $currentPath
+            }
+        }
+        $currentPath = Split-Path $currentPath -Parent
+    }
+    throw "Unable to find repository root"
+}