feat(nats)!: rename `nsc` plugin to `nats`

plugins/nats/README.md

+# 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.

plugins/nats/nats.plugin.zsh

+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

plugins/nsc/README.md

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

plugins/nsc/nsc.plugin.zsh

-if (( ! $+commands[nsc] )); then
-  return
-fi
-
-# If the completion file doesn't exist yet, we need to autoload it and
-# bind it to `nsc`. Otherwise, compinit will have already done that.
-if [[ ! -f "$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" &|