debugger: Extend f5 binding to contextually rerun the last session (#31753)

Release Notes:

- Debugger Beta: if there is no stopped or running session, `f5` now
reruns the last session, or opens the new session modal if there is no
previously-run session.

crates/workspace/src/workspace.rs

@@ -68,7 +68,7 @@ pub use persistence::{
 use postage::stream::Stream;
 use project::{
     DirectoryLister, Project, ProjectEntryId, ProjectPath, ResolvedPath, Worktree, WorktreeId,
-    debugger::breakpoint_store::BreakpointStoreEvent,
+    debugger::{breakpoint_store::BreakpointStoreEvent, session::ThreadStatus},
 };
 use remote::{SshClientDelegate, SshConnectionOptions, ssh_session::ConnectionIdentifier};
 use schemars::JsonSchema;
@@ -161,6 +161,8 @@ pub trait DebuggerProvider {
     fn task_scheduled(&self, cx: &mut App);
     fn debug_scenario_scheduled(&self, cx: &mut App);
     fn debug_scenario_scheduled_last(&self, cx: &App) -> bool;
+
+    fn active_thread_state(&self, cx: &App) -> Option<ThreadStatus>;
 }
 
 actions!(
@@ -202,6 +204,7 @@ actions!(
         Unfollow,
         Welcome,
         RestoreBanner,
+        ToggleExpandItem,
     ]
 );
 
@@ -5802,6 +5805,20 @@ impl Render for Workspace {
         let mut context = KeyContext::new_with_defaults();
         context.add("Workspace");
         context.set("keyboard_layout", cx.keyboard_layout().name().to_string());
+        if let Some(status) = self
+            .debugger_provider
+            .as_ref()
+            .and_then(|provider| provider.active_thread_state(cx))
+        {
+            match status {
+                ThreadStatus::Running | ThreadStatus::Stepping => {
+                    context.add("debugger_running");
+                }
+                ThreadStatus::Stopped => context.add("debugger_stopped"),
+                ThreadStatus::Exited | ThreadStatus::Ended => {}
+            }
+        }
+
         let centered_layout = self.centered_layout
             && self.center.panes().len() == 1
             && self.active_item(cx).is_some();