Serialize breakpoints when changing the state of a breakpoint (#27373)

This fixes a rare bug where a breakpoint isn't saved in the database
when a user toggles a breakpoint and immediately exits out of zed.

Release Notes:

- N/A

Co-authored-by: Piotr Osiewicz <peterosiewicz@gmail.com>

crates/workspace/src/workspace.rs

@@ -65,7 +65,8 @@ use persistence::{
 };
 use postage::stream::Stream;
 use project::{
-    DirectoryLister, Project, ProjectEntryId, ProjectPath, ResolvedPath, Worktree, WorktreeId,
+    debugger::breakpoint_store::BreakpointStoreEvent, DirectoryLister, Project, ProjectEntryId,
+    ProjectPath, ResolvedPath, Worktree, WorktreeId,
 };
 use remote::{ssh_session::ConnectionIdentifier, SshClientDelegate, SshConnectionOptions};
 use schemars::JsonSchema;
@@ -974,6 +975,17 @@ impl Workspace {
         })
         .detach();
 
+        cx.subscribe_in(
+            &project.read(cx).breakpoint_store(),
+            window,
+            |workspace, _, evt, window, cx| {
+                if let BreakpointStoreEvent::BreakpointsUpdated(_, _) = evt {
+                    workspace.serialize_workspace(window, cx);
+                }
+            },
+        )
+        .detach();
+
         cx.on_focus_lost(window, |this, window, cx| {
             let focus_handle = this.focus_handle(cx);
             window.focus(&focus_handle);