Extract paths out of util (#13182)

This PR extracts the definition of the various Zed paths out of `util`
and into a new `paths` crate.

`util` is for generic utils, while these paths are Zed-specific. For
instance, `gpui` depends on `util`, and it shouldn't have knowledge of
these paths, since they are only used by Zed.

Release Notes:

- N/A

crates/prettier/src/prettier.rs

@@ -5,13 +5,14 @@ use gpui::{AsyncAppContext, Model};
 use language::{language_settings::language_settings, Buffer, Diff};
 use lsp::{LanguageServer, LanguageServerId};
 use node_runtime::NodeRuntime;
+use paths::DEFAULT_PRETTIER_DIR;
 use serde::{Deserialize, Serialize};
 use std::{
     ops::ControlFlow,
     path::{Path, PathBuf},
     sync::Arc,
 };
-use util::paths::{PathMatcher, DEFAULT_PRETTIER_DIR};
+use util::paths::PathMatcher;
 
 #[derive(Clone)]
 pub enum Prettier {