Add game rules to the site

[Phrancis]

Right now the game rules are in the main repo's wiki. They need to be on the Cyborg Chronicles portion on the site (since different mods will undoubtedly have different rules).

• [x] Add a mapping to the controller
• [x] Create HTML file with the rules
• [x] Update the menu link
• [x] Delete the page from the wiki

[Phrancis]

TODO: Talk to @marcandregirard about the test for game rules. Link

[Phrancis]

File game-rules.html created and content added.

[Phrancis]

All done.