Add bmo nag definition for testing

dotfiles/config/bmo/nag.ini

 [nag.stream]
     main = stconflict wttr timenow
+    test = woe
+
+[nag.def.woe]
+    command = date -Isec | sed 's/T/ /'
+    expiry = 3s
+    term-color = lyellow
 
 [nag.def.timenow]
     command = date --rfc-3339=seconds