feat(task): Task description in the form of comments (#23101)

Closes #22786.

TLDR;
```jsonc
{
  "tasks": {
    // Some comment
    //
    // describing what the task does
    "dev": "deno run -A --watch main.ts"
  }
}
```
```bash
deno task
```
![Screenshot 2024-03-27 at 1 43
49 PM](https://github.com/denoland/deno/assets/17734409/7a14da8c-8e63-45ba-9bfb-590d250b56a9)

1 files changed, 6 insertions, 1 deletions

diff --git a/cli/lsp/diagnostics.rs b/cli/lsp/diagnostics.rs
index 03d962741..e518f4c6e 100644
--- a/cli/lsp/diagnostics.rs
+++ b/cli/lsp/diagnostics.rs
@@ -1617,7 +1617,12 @@ mod tests {
     let config = Config::new_with_roots([resolve_url("file:///").unwrap()]);
     if let Some((base_url, json_string)) = maybe_import_map {
       let base_url = resolve_url(base_url).unwrap();
-      let config_file = ConfigFile::new(json_string, base_url).unwrap();
+      let config_file = ConfigFile::new(
+        json_string,
+        base_url,
+        &deno_config::ParseOptions::default(),
+      )
+      .unwrap();
       config.tree.inject_config_file(config_file).await;
     }
     StateSnapshot {