debugger: Add Debug Panel context menu (#28847)

This PR adds a debug panel context menu that will allow a user to select
which debug session items are visible.

The context menu will add to the pane that was right clicked on.

<img width="1275" alt="Screenshot 2025-04-16 at 2 43 36 AM"
src="https://github.com/user-attachments/assets/330322ff-69db-4731-bbaf-3544d53f2f15"
/>


Release Notes:

- N/A

crates/debugger_ui/src/persistence.rs

@@ -1,4 +1,5 @@
 use collections::HashMap;
+use dap::Capabilities;
 use db::kvp::KEY_VALUE_STORE;
 use gpui::{Axis, Context, Entity, EntityId, Focusable, Subscription, WeakEntity, Window};
 use project::Project;
@@ -9,19 +10,43 @@ use workspace::{Member, Pane, PaneAxis, Workspace};
 
 use crate::session::running::{
     self, RunningState, SubView, breakpoint_list::BreakpointList, console::Console,
-    module_list::ModuleList, stack_frame_list::StackFrameList, variable_list::VariableList,
+    loaded_source_list::LoadedSourceList, module_list::ModuleList,
+    stack_frame_list::StackFrameList, variable_list::VariableList,
 };
 
-#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq)]
+#[derive(Clone, Hash, Copy, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub(crate) enum DebuggerPaneItem {
     Console,
     Variables,
     BreakpointList,
     Frames,
     Modules,
+    LoadedSources,
 }
 
 impl DebuggerPaneItem {
+    pub(crate) fn all() -> &'static [DebuggerPaneItem] {
+        static VARIANTS: &[DebuggerPaneItem] = &[
+            DebuggerPaneItem::Console,
+            DebuggerPaneItem::Variables,
+            DebuggerPaneItem::BreakpointList,
+            DebuggerPaneItem::Frames,
+            DebuggerPaneItem::Modules,
+            DebuggerPaneItem::LoadedSources,
+        ];
+        VARIANTS
+    }
+
+    pub(crate) fn is_supported(&self, capabilities: &Capabilities) -> bool {
+        match self {
+            DebuggerPaneItem::Modules => capabilities.supports_modules_request.unwrap_or_default(),
+            DebuggerPaneItem::LoadedSources => capabilities
+                .supports_loaded_sources_request
+                .unwrap_or_default(),
+            _ => true,
+        }
+    }
+
     pub(crate) fn to_shared_string(self) -> SharedString {
         match self {
             DebuggerPaneItem::Console => SharedString::new_static("Console"),
@@ -29,10 +54,17 @@ impl DebuggerPaneItem {
             DebuggerPaneItem::BreakpointList => SharedString::new_static("Breakpoints"),
             DebuggerPaneItem::Frames => SharedString::new_static("Frames"),
             DebuggerPaneItem::Modules => SharedString::new_static("Modules"),
+            DebuggerPaneItem::LoadedSources => SharedString::new_static("Sources"),
         }
     }
 }
 
+impl From<DebuggerPaneItem> for SharedString {
+    fn from(item: DebuggerPaneItem) -> Self {
+        item.to_shared_string()
+    }
+}
+
 #[derive(Debug, Serialize, Deserialize)]
 pub(crate) struct SerializedAxis(pub Axis);
 
@@ -136,6 +168,7 @@ pub(crate) fn deserialize_pane_layout(
     module_list: &Entity<ModuleList>,
     console: &Entity<Console>,
     breakpoint_list: &Entity<BreakpointList>,
+    loaded_sources: &Entity<LoadedSourceList>,
     subscriptions: &mut HashMap<EntityId, Subscription>,
     window: &mut Window,
     cx: &mut Context<RunningState>,
@@ -157,6 +190,7 @@ pub(crate) fn deserialize_pane_layout(
                     module_list,
                     console,
                     breakpoint_list,
+                    loaded_sources,
                     subscriptions,
                     window,
                     cx,
@@ -191,7 +225,7 @@ pub(crate) fn deserialize_pane_layout(
                 .iter()
                 .map(|child| match child {
                     DebuggerPaneItem::Frames => Box::new(SubView::new(
-                        pane.focus_handle(cx),
+                        stack_frame_list.focus_handle(cx),
                         stack_frame_list.clone().into(),
                         DebuggerPaneItem::Frames,
                         None,
@@ -212,13 +246,19 @@ pub(crate) fn deserialize_pane_layout(
                         cx,
                     )),
                     DebuggerPaneItem::Modules => Box::new(SubView::new(
-                        pane.focus_handle(cx),
+                        module_list.focus_handle(cx),
                         module_list.clone().into(),
                         DebuggerPaneItem::Modules,
                         None,
                         cx,
                     )),
-
+                    DebuggerPaneItem::LoadedSources => Box::new(SubView::new(
+                        loaded_sources.focus_handle(cx),
+                        loaded_sources.clone().into(),
+                        DebuggerPaneItem::LoadedSources,
+                        None,
+                        cx,
+                    )),
                     DebuggerPaneItem::Console => Box::new(SubView::new(
                         pane.focus_handle(cx),
                         console.clone().into(),