Update Game Info and Hub Guidelines

[tomojira]

• Removed outdated information on FDS game titles
• Clarified that hacks of unlicensed or homebrew games can simply be tagged ~Hack~ instead of ~Unlicensed~ ~Hack~ or ~Homebrew~ ~Hack~
• Clarified that sometimes unofficial game titles can be used as the canonical title if they're very well-known and used by other sources such as Wikipedia, like "Fire Emblem: The Blazing Blade"
• Removed outdated information on the publisher field for hacks
• Capitalized "Turn-Based RPG" since that change was made with the hub
• Screenshots can now be up to 4 MB
• Heavily updated the screenshot dimensions section to match with the new settings on the site
• New information that Hacks hubs can be made with only 1 or 2 games
• Removed outdated information on how to use the Unlicensed hub
• Added notice that the pinned thread in the site cleanup forum is more in-depth and takes precedence for guidelines on contributing