* Details about other sections
Added details about other sections under the "Interface" heading. Made improvements to the details of the existing sections, added info about customizability of the Unity editor, added Hitman Sniper to list of games and other minor improvements.
* fix: added front matter block back
Split up Overview section, as it's rather long for a general overview. Removed "Unity is the engine used by Rust, Kerbal Space Program, and Cuphead" as it repeats pieces of information from the Noteworthy Games section. Also, removed the colon ":" from the Noteworthy Games title, as it's redundant with it being a header.