debugger: Add onboarding modal (#32961)

- **debugger: Add debugger onboarding modal (wip)**
- **woops**

Release Notes:

- debugger: Added the onboarding modal.

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Julia Ryan <p1n3appl3@users.noreply.github.com>

crates/debugger_ui/src/onboarding_modal.rs

@@ -0,0 +1,166 @@
+use gpui::{
+    ClickEvent, DismissEvent, Entity, EventEmitter, FocusHandle, Focusable, MouseDownEvent, Render,
+};
+use ui::{TintColor, Vector, VectorName, prelude::*};
+use workspace::{ModalView, Workspace};
+
+use crate::DebugPanel;
+
+macro_rules! debugger_onboarding_event {
+    ($name:expr) => {
+        telemetry::event!($name, source = "Debugger Onboarding");
+    };
+    ($name:expr, $($key:ident $(= $value:expr)?),+ $(,)?) => {
+        telemetry::event!($name, source = "Debugger Onboarding", $($key $(= $value)?),+);
+    };
+}
+
+pub struct DebuggerOnboardingModal {
+    focus_handle: FocusHandle,
+    workspace: Entity<Workspace>,
+}
+
+impl DebuggerOnboardingModal {
+    pub fn toggle(workspace: &mut Workspace, window: &mut Window, cx: &mut Context<Workspace>) {
+        let workspace_entity = cx.entity();
+        workspace.toggle_modal(window, cx, |_window, cx| Self {
+            workspace: workspace_entity,
+            focus_handle: cx.focus_handle(),
+        });
+    }
+
+    fn open_panel(&mut self, _: &ClickEvent, window: &mut Window, cx: &mut Context<Self>) {
+        self.workspace.update(cx, |workspace, cx| {
+            workspace.focus_panel::<DebugPanel>(window, cx);
+        });
+
+        cx.emit(DismissEvent);
+
+        debugger_onboarding_event!("Open Panel Clicked");
+    }
+
+    fn view_blog(&mut self, _: &ClickEvent, _: &mut Window, cx: &mut Context<Self>) {
+        cx.open_url("http://zed.dev/blog/debugger");
+        cx.notify();
+
+        debugger_onboarding_event!("Blog Link Clicked");
+    }
+
+    fn cancel(&mut self, _: &menu::Cancel, _: &mut Window, cx: &mut Context<Self>) {
+        cx.emit(DismissEvent);
+    }
+}
+
+impl EventEmitter<DismissEvent> for DebuggerOnboardingModal {}
+
+impl Focusable for DebuggerOnboardingModal {
+    fn focus_handle(&self, _cx: &App) -> FocusHandle {
+        self.focus_handle.clone()
+    }
+}
+
+impl ModalView for DebuggerOnboardingModal {}
+
+impl Render for DebuggerOnboardingModal {
+    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        let window_height = window.viewport_size().height;
+        let max_height = window_height - px(200.);
+
+        let base = v_flex()
+            .id("debugger-onboarding")
+            .key_context("DebuggerOnboardingModal")
+            .relative()
+            .w(px(450.))
+            .h_full()
+            .max_h(max_height)
+            .p_4()
+            .gap_2()
+            .elevation_3(cx)
+            .track_focus(&self.focus_handle(cx))
+            .overflow_hidden()
+            .on_action(cx.listener(Self::cancel))
+            .on_action(cx.listener(|_, _: &menu::Cancel, _window, cx| {
+                debugger_onboarding_event!("Canceled", trigger = "Action");
+                cx.emit(DismissEvent);
+            }))
+            .on_any_mouse_down(cx.listener(|this, _: &MouseDownEvent, window, _cx| {
+                this.focus_handle.focus(window);
+            }))
+            .child(
+                div()
+                    .absolute()
+                    .top(px(-8.0))
+                    .right_0()
+                    .w(px(400.))
+                    .h(px(92.))
+                    .child(
+                        Vector::new(
+                            VectorName::DebuggerGrid,
+                            rems_from_px(400.),
+                            rems_from_px(92.),
+                        )
+                        .color(ui::Color::Custom(cx.theme().colors().text.alpha(0.32))),
+                    ),
+            )
+            .child(
+                div()
+                    .absolute()
+                    .inset_0()
+                    .size_full()
+                    .bg(gpui::linear_gradient(
+                        175.,
+                        gpui::linear_color_stop(
+                            cx.theme().colors().elevated_surface_background,
+                            0.,
+                        ),
+                        gpui::linear_color_stop(
+                            cx.theme().colors().elevated_surface_background.opacity(0.),
+                            0.8,
+                        ),
+                    )),
+            )
+            .child(
+                v_flex()
+                    .w_full()
+                    .gap_1()
+                    .child(
+                        Label::new("Introducing")
+                            .size(LabelSize::Small)
+                            .color(Color::Muted),
+                    )
+                    .child(Headline::new("Zed's Debugger").size(HeadlineSize::Large)),
+            )
+            .child(h_flex().absolute().top_2().right_2().child(
+                IconButton::new("cancel", IconName::X).on_click(cx.listener(
+                    |_, _: &ClickEvent, _window, cx| {
+                        debugger_onboarding_event!("Cancelled", trigger = "X click");
+                        cx.emit(DismissEvent);
+                    },
+                )),
+            ));
+
+        let open_panel_button = Button::new("open-panel", "Get Started with the Debugger")
+            .icon_size(IconSize::Indicator)
+            .style(ButtonStyle::Tinted(TintColor::Accent))
+            .full_width()
+            .on_click(cx.listener(Self::open_panel));
+
+        let blog_post_button = Button::new("view-blog", "Check out the Blog Post")
+            .icon(IconName::ArrowUpRight)
+            .icon_size(IconSize::Indicator)
+            .icon_color(Color::Muted)
+            .full_width()
+            .on_click(cx.listener(Self::view_blog));
+
+        let copy = "It's finally here: Native support for debugging across multiple programming languages.";
+
+        base.child(Label::new(copy).color(Color::Muted)).child(
+            v_flex()
+                .w_full()
+                .mt_2()
+                .gap_2()
+                .child(open_panel_button)
+                .child(blog_post_button),
+        )
+    }
+}