ssh: Add session state indicator to title bar (#18645)

![image](https://github.com/user-attachments/assets/0ed6f59c-e0e7-49e6-8db7-f09ec5cdf653)
The indicator turns yellow when ssh client is trying to reconnect. Note
that the state tracking is probably not ideal (we'll see how it pans out
once we start dog-fooding), but at the very least "green=good" should be
a decent mental model for now.

Release Notes:

- N/A

crates/project/src/project.rs

@@ -1217,7 +1217,10 @@ impl Project {
         server.ssh_connection_string.is_some()
     }
 
-    pub fn ssh_connection_string(&self, cx: &ModelContext<Self>) -> Option<SharedString> {
+    pub fn ssh_connection_string(&self, cx: &AppContext) -> Option<SharedString> {
+        if let Some(ssh_state) = &self.ssh_client {
+            return Some(ssh_state.connection_string().into());
+        }
         let dev_server_id = self.dev_server_project_id()?;
         dev_server_projects::Store::global(cx)
             .read(cx)
@@ -1226,6 +1229,10 @@ impl Project {
             .clone()
     }
 
+    pub fn ssh_is_connected(&self) -> Option<bool> {
+        Some(!self.ssh_client.as_ref()?.is_reconnect_underway())
+    }
+
     pub fn replica_id(&self) -> ReplicaId {
         match self.client_state {
             ProjectClientState::Remote { replica_id, .. } => replica_id,