This also changes our handiling of snippet edits on the client side. `editor.insertSnippet` unfortunately forces indentation, which we really don't want to have to deal with. So, let's just implement our manual hacky way of dealing with a simple subset of snippets we actually use in rust-analyzer
rust-analyzer
Provides support for rust-analyzer: novel LSP server for the Rust programming language.
See https://rust-analyzer.github.io/ for more information.