🚧 Feedback modal UI 🚧 (#3536)

[[PR Description]]

TODO: 
- [x] Add placeholder text to editor
- [x] Add external link icon to "Community repo" button
- [x] Show `not-allowed` cursor for disabled buttons
- [ ] Add `Headline` ui component
- [ ] Finish UI pass
- [ ] Fix `IconPosition` on button (should swap the icon side)
- [ ] Add conditional tooltip for disabled "Send feedback" button.
- [ ] Add common/top feedback link.
- [ ] Add `vw`/`vh` units to allow sizing the modal based on viewport
size.

Release Notes:

- N/A

crates/ui2/src/components/button/button_like.rs

@@ -30,6 +30,13 @@ pub trait ButtonCommon: Clickable + Disableable {
     fn tooltip(self, tooltip: impl Fn(&mut WindowContext) -> AnyView + 'static) -> Self;
 }
 
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, Default)]
+pub enum IconPosition {
+    #[default]
+    Start,
+    End,
+}
+
 #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, Default)]
 pub enum ButtonStyle {
     /// A filled button with a solid background color. Provides emphasis versus
@@ -347,6 +354,7 @@ impl RenderOnce for ButtonLike {
                 ButtonSize::None => this,
             })
             .bg(self.style.enabled(cx).background)
+            .when(self.disabled, |this| this.cursor_not_allowed())
             .when(!self.disabled, |this| {
                 this.cursor_pointer()
                     .hover(|hover| hover.bg(self.style.hovered(cx).background))