Add tasks for all the new languages

Task/Short-circuit-evaluation/Nim/short-circuit-evaluation.nim

@@ -0,0 +1,10 @@
+proc a(x): bool =
+  echo "a called"
+  result = x
+proc b(x): bool =
+  echo "b called"
+  result = x
+
+let x = a(false) and b(true) # echoes "a called"
+
+let y = a(true) or b(true) # echoes "a called"