add workspace

crates/workspace/src/views/repo_list.rs

@@ -1,8 +1,9 @@
 use gpui::prelude::*;
 use gpui::{
-    AnyElement, App, Context, Entity, Render, SharedString, Subscription, Window, div, px,
-    uniform_list,
+    AnyElement, App, Context, Entity, EventEmitter, FocusHandle, Focusable, Render, SharedString,
+    Subscription, Window, div, px, uniform_list,
 };
+use gpui_component::dock::{Panel, PanelEvent};
 use gpui_component::{ActiveTheme, StyledExt};
 use signed_core::Announcement;
 use signed_state::{ProfileStore, RepoListStore};
@@ -10,6 +11,7 @@ use signed_state::{ProfileStore, RepoListStore};
 /// Browse all announced repositories (works anonymously).
 pub struct RepoListView {
     store: Entity<RepoListStore>,
+    focus_handle: FocusHandle,
     _subscription: Subscription,
 }
 
@@ -20,11 +22,30 @@ impl RepoListView {
 
         Self {
             store,
+            focus_handle: cx.focus_handle(),
             _subscription: subscription,
         }
     }
 }
 
+impl Panel for RepoListView {
+    fn panel_name(&self) -> &'static str {
+        "repo_list"
+    }
+
+    fn title(&mut self, _window: &mut Window, _cx: &mut Context<Self>) -> impl IntoElement {
+        "Explore"
+    }
+}
+
+impl EventEmitter<PanelEvent> for RepoListView {}
+
+impl Focusable for RepoListView {
+    fn focus_handle(&self, _cx: &App) -> FocusHandle {
+        self.focus_handle.clone()
+    }
+}
+
 fn render_card(announcement: &Announcement, cx: &mut App) -> AnyElement {
     let name = announcement
         .name