Add examples to fetch prefs from Lua & Python scripts

client/experimental_lib/example_lua/test.lua

@@ -13,3 +13,15 @@ end
 
 print("Device:", p.name)
 p:console("Rem passthru remark! :coffee:", true)
+
+local json = require("dkjson")
+print("Fetching prefs:")
+p:console("prefs show --json")
+local prefs, err = json.decode(p.grabbed_output)
+if not prefs then
+    print("Error decoding JSON: ", err)
+else
+    print("Save path: ", prefs['file.default.savepath'])
+    print("Dump path: ", prefs['file.default.dumppath'])
+    print("Trace path:", prefs['file.default.tracepath'])
+end