bin: add simple wrapper for wttr.in

diff --git a/bin/wttr b/bin/wttr
new file mode 100755 (executable)
index 0000000..7e0125b
--- /dev/null
+++ b/bin/wttr
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+curl wttr.in/$1