Ideas on getting some sort of plantuml syntax highlighting

[daytonb]

I'd like to have some sort of syntax highlighting plantuml diagrams. I'm not looking for super full-fledged language support like completions or advanced treesitter-style navigation, just some basic syntax highlighting. The only things I've seen in the docs about adding languages talk about setting up LSPs and or treesitter grammars. Is there anyone here that could point me at how I might get basic syntax highlighting? Or if I do have to go all the way to treesitter grammars / LSPs for some easy path to borrowing such work done for other editors like VSCode or neovim?