docs(svelte): Add mention of vtsls with plugin (#1687)

Author: Uzaaft

lua/astrocommunity/pack/svelte/README.md

@@ -4,5 +4,6 @@ This plugin pack does the following:
 
 - Adds `svelte` and `scss` Treesitter parsers
 - Adds `svelte` language server
+- Adds `vtsls` with `typescript-svelte-plugin` for Svelte support
 - Adds `js-debug-adapter` for debugging
 - Adds [nvim-dap-vscode-js](https://github.com/mxsdev/nvim-dap-vscode-js) for debugging