Add command module documentaiton generation tool

Add a tool to the `./tools` directory to automatically generate markdown content for the [Command Modules](https://github.com/beefproject/beef/wiki/BeEF-modules) page on the wiki.

Optionally also improve the format of the page. The data lends itself to a table format.

The format could be improved by including a link to the module source code in the repository and maybe also include the module description.