copy over to engine-q demo.nu

engine-q/nu_101/README.md

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+# Nu_101 Scripts
+
+### Definition
+
+These scripts should be used to demonstrate to the beginner how nushell scripting works. Perhaps how it's different from Windows `batch` files and `bash` shell scripts. Also, to show off how nushell pipes commands in and out of one another.

engine-q/nu_101/demo.nu

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+def my-ls [x] {
+    ls $x | where size > 10kb
+}
+
+my-ls .