feat(1password): add plugin for 1password (#8884)

Co-authored-by: Marc Cornellà <hello@mcornella.com>

plugins/1password/1password.plugin.zsh

+if (( ${+commands[op]} )); then
+  eval "$(op completion zsh)"
+  compdef _op op
+fi
+
+# opswd puts the password of the named service into the clipboard. If there's a
+# one time password, it will be copied into the clipboard after 5 seconds. The
+# clipboard is cleared after another 10 seconds.
+function opswd() {
+  if [[ $# -lt 1 ]]; then
+    echo "Usage: opswd <service>"
+    return 1
+  fi
+
+  local service=$1
+
+  # If not logged in, print error and return
+  op list users > /dev/null || return
+
+  local password
+  # Copy the password to the clipboard
+  if ! password=$(op get item "$service" --fields password 2>/dev/null); then
+    echo "error: could not obtain password for $service"
+    return 1
+  fi
+
+  echo -n "$password" | clipcopy
+  echo "✔ password for $service copied to clipboard"
+
+  # If there's a one time password, copy it to the clipboard after 5 seconds
+  local totp
+  if totp=$(op get totp "$service" 2>/dev/null) && [[ -n "$totp" ]]; then
+    sleep 10 && echo -n "$totp" | clipcopy
+    echo "✔ TOTP for $service copied to clipboard"
+  fi
+
+  (sleep 20 && clipcopy </dev/null 2>/dev/null) &!
+}
+
+function _opswd() {
+  local -a services
+  services=("${(@f)$(op list items --categories Login 2>/dev/null | op get item - --fields title 2>/dev/null)}")
+  [[ -z "$services" ]] || compadd -a -- services
+}
+
+compdef _opswd opswd

plugins/1password/README.md

+# 1Password
+
+This plugin adds 1Password functionality to oh-my-zsh.
+
+To use, add `1password` to the list of plugins in your `.zshrc` file:
+
+```zsh
+plugins=(... 1password)
+```
+
+Then, you can use the command `opswd` to copy passwords for services into your
+clipboard.
+
+## `opwsd`
+
+The `opswd` command is a wrapper around the `op` command. It takes a service
+name as an argument and copies the password for that service to the clipboard.
+
+If the service also contains a TOTP, it is copied to the clipboard after 10 seconds.
+Finally, after 20 seconds, the clipboard is cleared.
+
+The function has completion support, so you can use tab completion to select
+which service you want to get.
+
+For example, `opswd github.com` will put your GitHub password into your clipboard, and if
+a TOTP is available, it will be copied to the clipboard after 10 seconds.
+
+> NOTE: you need to be logged in for `opswd` to work. See:
+>
+> - [Sign in or out](https://support.1password.com/command-line/#sign-in-or-out)
+> - [Session management](https://support.1password.com/command-line/#appendix-session-management)
+
+## Requirements
+
+- [1Password's command line utility](https://1password.com/downloads/command-line/).