reorganize module

_archive/rhai_engine/rhaibook/ref/print-debug.md

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+`print` and `debug`
+===================
+
+The `print` and `debug` functions can be used to output values.
+
+```js
+print("hello");         // prints "hello" to stdout
+
+print(1 + 2 + 3);       // prints "6" to stdout
+
+let x = 42;
+
+print(`hello${x}`);     // prints "hello42" to stdout
+
+debug("world!");        // prints "world!" to stdout using debug formatting
+```