New Parser Backend (Tree-Sitter)

[EagleoutIce]

No description provided.

[Ellpeck]

Still left to do (carried over from #1160):

• switch to npm package once available, to avoid wasm and (hopefully init)
  • Still allow the wasm backend (e.g., if we want to develop/explore part of it) with
    a user-supplied .wasm file.
• Document the new backend and the way we can configure it (Flo, later)
  • Send info to Flo on what should be documented (especially self-building the wasm thingy for tree-sitter-r + how to specify it in the config / cli)
• Also execute benchmarks with tree-sitter and r shell separately -> add as new matrix row
  • Also publish them on the website -> display above the current ones so that you have to scroll down to see the RShell ones
• Fix the three-ish errors that occur with the tree sitter parser in the social-science benchmark suite (-> are these even still relevant? I don't remember tbh)
• Allow setting the tree-sitter wasm path in the config also (currently only able to set the tree-sitter-r path)

[EagleoutIce]

This pull request is included in v2.2.0 (see Release v2.2.0 (Tree-Sitter Engine)).