VS Code -> Zed tasks converter (#9538)

We can convert shell, npm and gulp tasks to a Zed format. Additionally, we convert a subset of task variables that VsCode supports.

Release notes:

- Zed can now load tasks in Visual Studio Code task format

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Co-authored-by: Piotr Osiewicz <piotr@zed.dev>
Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>

crates/task/src/lib.rs

@@ -3,6 +3,7 @@
 
 pub mod oneshot_source;
 pub mod static_source;
+mod vscode_format;
 
 use collections::HashMap;
 use gpui::ModelContext;
@@ -10,6 +11,7 @@ use static_source::RevealStrategy;
 use std::any::Any;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
+pub use vscode_format::VsCodeTaskFile;
 
 /// Task identifier, unique within the application.
 /// Based on it, task reruns and terminal tabs are managed.