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/copilot/Cargo.toml

@@ -38,6 +38,7 @@ lsp.workspace = true
 menu.workspace = true
 node_runtime.workspace = true
 parking_lot.workspace = true
+paths.workspace = true
 project.workspace = true
 serde.workspace = true
 settings.workspace = true

crates/copilot/src/copilot.rs

@@ -33,7 +33,7 @@ use std::{
     path::{Path, PathBuf},
     sync::Arc,
 };
-use util::{fs::remove_matching, maybe, paths, ResultExt};
+use util::{fs::remove_matching, maybe, ResultExt};
 
 pub use copilot_completion_provider::CopilotCompletionProvider;
 pub use sign_in::CopilotCodeVerification;