Add support for tree-sitter-svelte #1194
Description
As I understand it, the work that needs to be done to achieve this is that we need to define a tree-sitter-svelte-tags.scm file, similar to these: https://github.com/paul-gauthier/aider/tree/main/aider/queries
Unfortunately, Svelte is a multi-language language, where you might have JavaScript inside <script> tags, TypeScript inside <script lang="ts"> tags, CSS/PostCSS in <style> tags, and HTML mixed with Svelte constructs at the top-level (all other tags).
I don't see an example of a .scm file with multiple embedded languages in the queries directory that we can use as inspiration, so this might be a bit more difficult.