VS Code companion (#461)

* Init port discovery

* Fmt

* Remove unused

* Fmt

* Simplify

* Container lookup API

* Isolated task details

* Fmt

* Lint and format

* Lint

crates/utils/src/lib.rs

@@ -8,6 +8,7 @@ pub mod diff;
 pub mod log_msg;
 pub mod msg_store;
 pub mod path;
+pub mod port_file;
 pub mod response;
 pub mod sentry;
 pub mod shell;

crates/utils/src/port_file.rs

@@ -0,0 +1,12 @@
+use std::{env, path::PathBuf};
+
+use tokio::fs;
+
+pub async fn write_port_file(port: u16) -> std::io::Result<PathBuf> {
+    let dir = env::temp_dir().join("vibe-kanban");
+    let path = dir.join("vibe-kanban.port");
+    tracing::debug!("Writing port {} to {:?}", port, path);
+    fs::create_dir_all(&dir).await?;
+    fs::write(&path, port.to_string()).await?;
+    Ok(path)
+}