chore: import upstream snapshot with attribution

tests/fixtures/sample.ps1

@@ -0,0 +1,48 @@
+using namespace System.IO
+using module MyModule
+
+function Get-Data {
+    param(
+        [string]$Name,
+        [int]$Count = 10
+    )
+    $result = Process-Items -Name $Name -Count $Count
+    return $result
+}
+
+function Process-Items {
+    param([string]$Name, [int]$Count)
+    Write-Output "Processing $Count items for $Name"
+}
+
+class DataProcessor {
+    [string]$Source
+
+    DataProcessor([string]$source) {
+        $this.Source = $source
+    }
+
+    [string] Transform([string]$input) {
+        return $input.ToUpper()
+    }
+
+    [void] Save([string]$path) {
+        Set-Content -Path $path -Value $this.Source
+    }
+}
+
+class Shape {
+    [string]$Kind
+
+    [double] Area() {
+        return 0.0
+    }
+}
+
+class Circle : Shape {
+    [double]$Radius
+
+    [double] Area() {
+        return 3.14159 * $this.Radius * $this.Radius
+    }
+}