docs: add readme for printevenarguments subject

subjects/printevenarguments/README.md

@@ -0,0 +1,15 @@
+## printevenarguments
+
+### Instructions
+
+Write a program that receives some arguments from the command line and prints the ones with an even index followed by a new line. If the number of even arguments is 0, print a new line.
+
+### Usage
+
+```console
+$ go run . first second third | cat -e
+second$
+$ go run . a b c d| cat -e
+b$
+d$
+```