feat(sops): introduce sops plugin

plugins/sops/README.md

@@ -0,0 +1,9 @@
+## Sops
+
+This plugin adds completion for [sops](https://github.com/scaleway/scaleway-cli), the simple and flexible tool for managing secrets.
+
+To use it, add `sops` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... sops)
+```