windows: Fix eslint installation (#15331)

Close #13786. To make `eslint` running on Windows, I made the following
changes:

1. Ensure that `zed` downloads the `.zip` file.
2. Handle the `$shared` symbolic link by copying files to the link
location.
3. In #13891, I mentioned that the `npm` `post-install` script was
always failing. After debugging, I found it was due to missing
environment variables. This has been fixed, and I will submit a new PR
to address the changes in #13891.

With this PR, `eslint` can now successfully run on Windows. Video:



https://github.com/user-attachments/assets/e85451b8-0388-490a-8a75-01c12d744f7c



Release Notes:

- Fixed `eslint` not running on Windows
([#13786](https://github.com/zed-industries/zed/issues/13786)).

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

crates/http_client/src/github.rs

@@ -120,6 +120,7 @@ pub async fn get_release_by_tag_name(
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub enum AssetKind {
     TarGz,
+    Zip,
 }
 
 pub fn build_asset_url(repo_name_with_owner: &str, tag: &str, kind: AssetKind) -> Result<String> {
@@ -132,6 +133,7 @@ pub fn build_asset_url(repo_name_with_owner: &str, tag: &str, kind: AssetKind) -
         "{tag}.{extension}",
         extension = match kind {
             AssetKind::TarGz => "tar.gz",
+            AssetKind::Zip => "zip",
         }
     );
     url.path_segments_mut()
@@ -154,5 +156,11 @@ mod tests {
             tarball,
             "https://github.com/microsoft/vscode-eslint/archive/refs/tags/release%2F2.3.5.tar.gz"
         );
+
+        let zip = build_asset_url(repo_name_with_owner, tag, AssetKind::Zip).unwrap();
+        assert_eq!(
+            zip,
+            "https://github.com/microsoft/vscode-eslint/archive/refs/tags/release%2F2.3.5.zip"
+        );
     }
 }