cuyo: add page (#4954)

pages/linux/cuyo.md

@@ -0,0 +1,20 @@
+# cuyo
+
+> Tetris like game.
+> More information: <https://www.karimmi.de/cuyo/>.
+
+- Start a new game:
+
+`cuyo`
+
+- Navigate the piece horizontally:
+
+`{{A|D}} OR {{Left|Right}} arrow key`
+
+- Turn the piece:
+
+`{{W|Up arrow key}} `
+
+- Hard drop the piece:
+
+`{{S|Down arrow key}}`