feat: add feynman as contributor

content/post/contributors/feynman.md

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+---
+title: "Feynman"
+date: 2021-04-10T13:47:57+02:00
+authors: ["feynman"]
+---
+
+Richard P. Feynman (1918-1988), scientist, teacher, raconteur, and drummer. He assisted in the development of the atomic bomb, expanded the understanding of quantum electrodynamics, translated Mayan hieroglyphics, and cut to the heart of the Challenger disaster. But beyond all of that, Richard Feynman was a unique and multi-faceted individual.