debugger: Add close button and coloring to debug panel session's menu (#28310)

This PR adds colors to debug panel's session menu that indicate the
state of each respective session. It also adds a close button to each
entry.

green - running
yellow - stopped
red - terminated/ended 


Release Notes:

- N/A

crates/project/src/debugger/dap_store.rs

@@ -1,7 +1,7 @@
 use super::{
     breakpoint_store::BreakpointStore,
     locator_store::LocatorStore,
-    session::{self, Session},
+    session::{self, Session, SessionStateEvent},
 };
 use crate::{ProjectEnvironment, debugger, worktree_store::WorktreeStore};
 use anyhow::{Result, anyhow};
@@ -869,6 +869,15 @@ fn create_new_session(
         }
 
         this.update(cx, |_, cx| {
+            cx.subscribe(
+                &session,
+                move |this: &mut DapStore, _, event: &SessionStateEvent, cx| match event {
+                    SessionStateEvent::Shutdown => {
+                        this.shutdown_session(session_id, cx).detach_and_log_err(cx);
+                    }
+                },
+            )
+            .detach();
             cx.emit(DapStoreEvent::DebugSessionInitialized(session_id));
         })?;
 

crates/project/src/debugger/session.rs

@@ -832,7 +832,12 @@ pub enum SessionEvent {
     Threads,
 }
 
+pub(crate) enum SessionStateEvent {
+    Shutdown,
+}
+
 impl EventEmitter<SessionEvent> for Session {}
+impl EventEmitter<SessionStateEvent> for Session {}
 
 // local session will send breakpoint updates to DAP for all new breakpoints
 // remote side will only send breakpoint updates when it is a breakpoint created by that peer
@@ -1553,6 +1558,8 @@ impl Session {
             )
         };
 
+        cx.emit(SessionStateEvent::Shutdown);
+
         cx.background_spawn(async move {
             let _ = task.await;
         })