doc: sample: add/update sample script files

doc/sample/simple.bshell

@@ -1,8 +1,14 @@
 func test-function($name) {
-	echo "Hello, $name!"
+	echo "Hello, $name! $(2 + 4 + 2) wow"
 }
 
 # Example of instantiating an FX runtime object.
 $obj = new-object -type-name fx.string -arguments "John Doe"
 
+$hash = @{
+    1       = 'one'
+    2       = 'two'
+    'three' = 3
+}
+
 test-function -name $obj