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/node_runtime/src/node_runtime.rs

@@ -138,7 +138,7 @@ impl RealNodeRuntime {
         };
 
         let folder_name = format!("node-{VERSION}-{os}-{arch}");
-        let node_containing_dir = util::paths::SUPPORT_DIR.join("node");
+        let node_containing_dir = paths::SUPPORT_DIR.join("node");
         let node_dir = node_containing_dir.join(folder_name);
         let node_binary = node_dir.join(NODE_PATH);
         let npm_file = node_dir.join(NPM_PATH);