lang/scratch: Add Scratch 1.4.0.7, is a new programing language

that makes it easy to create your own interactive stories, animations,
games, music, and art - and share your creations on the web.

WWW: https://scratch.mit.edu/
PR: 216811
Requested by: Takeshi Mutoh <takeshi.mutoh@gmail.com>
Approved by: hrs (mentor)