update folderstructure to match xdg-ninja

zsh/.local/share/oh-my-zsh/.oh-my-zsh/plugins/doctl/README.md

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+# Doctl
+
+This plugin provides completion for [Doctl](https://github.com/digitalocean/doctl).
+
+To use it add doctl to the plugins array in your zshrc file.
+
+```bash
+plugins=(... doctl)
+```

zsh/.local/share/oh-my-zsh/.oh-my-zsh/plugins/doctl/doctl.plugin.zsh

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+# Autocompletion for doctl, the command line tool for DigitalOcean service
+#
+# doctl project: https://github.com/digitalocean/doctl
+#
+# Author: https://github.com/HalisCz
+
+if (( ! $+commands[doctl] )); then
+  return
+fi
+
+if [[ ! -f "$ZSH_CACHE_DIR/completions/_doctl" ]]; then
+  typeset -g -A _comps
+  autoload -Uz _doctl
+  _comps[doctl]=_doctl
+fi
+
+doctl completion zsh >| "$ZSH_CACHE_DIR/completions/_doctl" &|