feat: support app-defined icon sets

crates/core/src/button.rs

@@ -6,7 +6,7 @@ use gpui::{
     RenderOnce, Role, SharedString, StatefulInteractiveElement as _, Styled as _, Window, canvas,
     relative, transparent_black,
 };
-use gpui_native_icons::{IconRole, icon};
+use gpui_native_icons::Icon;
 use gpui_native_theme::{ActiveTheme as _, BORDER_WIDTH, Size};
 use gpui_native_utils::{focus_ring, record_anchor_bounds};
 use std::rc::Rc;
@@ -38,7 +38,7 @@ pub enum ButtonVariant {
 pub struct Button {
     id: ElementId,
     label: Option<SharedString>,
-    icon: Option<IconRole>,
+    icon: Option<Icon>,
     variant: ButtonVariant,
     size: Size,
     disabled: bool,
@@ -82,8 +82,11 @@ impl Button {
     }
 
     /// Shows an icon beside the label.
-    pub fn icon(mut self, role: IconRole) -> Self {
-        self.icon = Some(role);
+    pub fn icon<I>(mut self, icon: I) -> Self
+    where
+        I: Into<Icon>,
+    {
+        self.icon = Some(icon.into());
         self
     }
 
@@ -236,8 +239,8 @@ impl RenderOnce for Button {
                 )
             })
             .when(!self.loading, |button| {
-                button.when_some(self.icon, |button, role| {
-                    button.child(icon(role).size(metrics.icon_size).color(foreground))
+                button.when_some(self.icon, |button, icon| {
+                    button.child(icon.size(metrics.icon_size).color(foreground))
                 })
             })
             .when_some(self.label, |button, label| button.child(label))