feat(pass-cli): add completions plugin (#13740)

plugins/pass-cli/pass-cli.plugin.zsh

@@ -0,0 +1,14 @@
+# Autocompletion for Proton Pass CLI (pass-cli)
+if (( ! $+commands[pass-cli] )); then
+  return
+fi
+
+# If the completion file doesn't exist yet, we need to autoload it and
+# bind it to `pass-cli`. Otherwise, compinit will have already done that.
+if [[ ! -f "$ZSH_CACHE_DIR/completions/_pass-cli" ]]; then
+  typeset -g -A _comps
+  autoload -Uz _pass-cli
+  _comps[pass-cli]=_pass-cli
+fi
+
+pass-cli completions zsh >| "$ZSH_CACHE_DIR/completions/_pass-cli" &|