Finely scope repl events for runs and output clearing (#13872)

Sets up the `cmd-enter` keybinding for the jupyter repl to only apply
when enabled.

Release Notes:

- N/A

---------

Co-authored-by: Kirill <kirill@zed.dev>

crates/repl/src/kernels.rs

@@ -160,7 +160,11 @@ impl RunningKernel {
                 kernel_name: Some(format!("zed-{}", kernel_specification.name)),
             };
 
-            let connection_path = dirs::runtime_dir().join(format!("kernel-zed-{entity_id}.json"));
+            let runtime_dir = dirs::runtime_dir();
+            fs.create_dir(&runtime_dir)
+                .await
+                .with_context(|| format!("Failed to create jupyter runtime dir {runtime_dir:?}"))?;
+            let connection_path = runtime_dir.join(format!("kernel-zed-{entity_id}.json"));
             let content = serde_json::to_string(&connection_info)?;
             // write out file to disk for kernel
             fs.atomic_write(connection_path.clone(), content).await?;