As a user of the ATT&CK website, I want to be able to find training information for how to use ATT&CK.

The URLs will follow this format:

/resources/training (landing page)
                   /cti (topic intro)
                       /exercise1
                       /exercise2
                       /exercise3
                       /exercise4
                   /mappings (topic intro)
                       /exercise1
                       /exercise2
                       /exercise3
                       /exercise4
                   (etc)

Redirects will be created from /training to /resources/training and from /training/topic to /resources/training/topic for each topic.

These pages should make use of the sidebar macro for navigation. Each exercise should have a "previous" and "next" exercise button under the exercise content.