add gpg helper function

.config/zsh/alias/gpg.zsh

@@ -0,0 +1,11 @@
+#!/bin/zsh
+
+gpg-warmup() {
+    (( ${+commands[gpg]} )) || return 1
+    local r t
+    t=$(mktemp)
+    gpg --expert -abs "$t"
+    r=$?
+    command rm -f "$t" "$t.asc"
+    return "$r"
+}