Although Pluto can theoretically be used with Lua-based tooling, there is specialised support for it to enhance your coding experience in VS Code, Sublime Text, etc.
There is a TextMate bundle for Pluto available here. It provides syntax highlighting as well as snippets (e.g. when you type "fun" then press tab). This can be used in many applications, including Sublime Text and VS Code.
pluto-language-server is a simple wrapper on top of plutoc's ability to give you warnings, errors, and suggestions/completions, using LSP to deliver it right into your text editor.