11: Add Rust track exercise "Space Age".

Created by  9Zb2bmkejrNknawUtr3MKvVstZkVDR8x8ritfgZXKrky  on December 23, 2021
VXRUG632SEYNKNTQ4N6PNQHXIGUHKGLIBN457BIZYSCYSPNTW25QC
In channels
main
Change contents