port intro to Java debugger page

This also required porting the towers of hanoi download page.

I don't like way we are processing links, so I left a TODO to change it.

Author: garfieldnate

docs/downloads/examples_and_unsupported/index.md

@@ -5,3 +5,4 @@ own environments in a variety of language, namely C++, PHP, Python, Java and C.
 This code is unsupported but may still work.
 
 *   [C++ Command Line Filter Example](./cpp_command_line_filter_example.md)
+*   [Towers of Hanoi](./towers_of_hanoi.md)

docs/downloads/examples_and_unsupported/towers_of_hanoi.md

@@ -0,0 +1,60 @@
+---
+Tags:
+    - environments
+---
+
+# Towers of Hanoi
+
+The classic Towers of Hanoi puzzle implemented as an external, graphical environment
+using Java and interfaced with Soar via SML. To see how the agent performs the task,
+you must launch the Soar debugger and tell it to connect to a remote Soar agent.
+
+The Towers of Hanoi is a puzzle that consists of three rods and a number of disks
+of different sizes which can slide onto any rod. The puzzle starts with the disks
+in a neat stack in ascending order of size on one rod, the smallest at the top,
+thus making a conical shape. The objective of the puzzle is to move the entire
+stack to another rod, obeying the following rules:
+
+*   Only one disk may be moved at a time.
+*   Each move consists of taking the upper disk from one of the rods and sliding
+it onto another rod, on top of the other disks that may already be present on
+that rod.
+*   No disk may be placed on top of a smaller disk.
+
+*Description of game rules derived from [its Wikipedia page](https://web.archive.org/web/20211023052945/http://en.wikipedia.org/wiki/Towers_of_Hanoi)
+and is released under the [Creative Commons license](https://web.archive.org/web/20211023052945/http://creativecommons.org/licenses/by-sa/3.0/).*
+
+## Download Links
+
+*   [Java_Tower_of_Hanoi_Example.zip](https://github.com/SoarGroup/website-downloads/raw/main/Examples-and-Unsupported/Java_Tower_of_Hanoi_Example.zip)
+
+## Associated Agents
+
+There is one basic agent embedded within the environment that will automatically
+be sourced when you launch it.
+
+**Note**: You cannot run the many Towers of Hanoi agents available in the
+*Agents* downloads section with this environment. Those ones are not designed to
+be run with the I/O interface of this external environment.
+
+## Documentation
+
+While there is no explicit documentation, the Soar Debugger tutorial does have a
+section that explains how to hook up the debugger to this type of environment.
+
+## Associated Publications
+
+None
+
+## Developers
+
+Taylor Lafrinere
+
+## Soar Versions
+
+*   Soar 8
+*   Soar 9
+
+## Language
+
+Java