Unify the tasks modal and the new session modal (#31646)

Release Notes:

- Debugger Beta: added a button to the quick action bar to start a debug
session or spawn a task, depending on which of these actions was taken
most recently.
- Debugger Beta: incorporated the tasks modal into the new session modal
as an additional tab.

---------

Co-authored-by: Julia Ryan <juliaryan3.14@gmail.com>
Co-authored-by: Julia Ryan <p1n3appl3@users.noreply.github.com>
Co-authored-by: Anthony Eid <hello@anthonyeid.me>
Co-authored-by: Mikayla <mikayla@zed.dev>

crates/workspace/src/tasks.rs

@@ -56,6 +56,10 @@ impl Workspace {
     ) {
         let spawn_in_terminal = resolved_task.resolved.clone();
         if !omit_history {
+            if let Some(debugger_provider) = self.debugger_provider.as_ref() {
+                debugger_provider.task_scheduled(cx);
+            }
+
             self.project().update(cx, |project, cx| {
                 if let Some(task_inventory) =
                     project.task_store().read(cx).task_inventory().cloned()