update folderstructure to match xdg-ninja

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

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+# NATS plugin
+
+This plugin adds completion for several tools from [NATS](https://nats.io/).
+
+- [`nsc`](https://github.com/nats-io/nsc)
+- [`natscli`](https://github.com/nats-io/natscli)
+
+To use it, add `nats` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... nats)
+```
+
+This plugin does not add any aliases.

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

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+if (( $+commands[nsc] )); then
+  # If the completion file doesn't exist yet, we need to autoload it and
+  # bind it to `nsc`. Otherwise, compinit will have already done that.
+  if [[ ! -f "$ZSH_CACHE_DIR/completions/_nsc" ]]; then
+    typeset -g -A _comps
+    autoload -Uz _nsc
+    _comps[nsc]=_nsc
+  fi
+
+  nsc completion zsh >| "$ZSH_CACHE_DIR/completions/_nsc" &|
+fi
+
+if (( $+commands[nats] )); then
+  # If the completion file doesn't exist yet, we need to autoload it and
+  # bind it to `nats`. Otherwise, compinit will have already done that.
+  if [[ ! -f "$ZSH_CACHE_DIR/completions/_nats" ]]; then
+    typeset -g -A _comps
+    autoload -Uz _nats
+    _comps[nats]=_nats
+  fi
+
+  nats --completion-script-zsh >| "$ZSH_CACHE_DIR/completions/_nats" &|
+fi