Allow UI font weight to be assigned in settings (#12333)

Release Notes:

- Added the ability to configure the weight of your UI font in standard
CSS weight units from 0 to 900.

crates/extensions_ui/src/extensions_ui.rs

@@ -13,7 +13,7 @@ use extension::{ExtensionManifest, ExtensionOperation, ExtensionStore};
 use fuzzy::{match_strings, StringMatchCandidate};
 use gpui::{
     actions, canvas, uniform_list, AnyElement, AppContext, EventEmitter, FocusableView, FontStyle,
-    FontWeight, InteractiveElement, KeyContext, ParentElement, Render, Styled, Task, TextStyle,
+    InteractiveElement, KeyContext, ParentElement, Render, Styled, Task, TextStyle,
     UniformListScrollHandle, View, ViewContext, VisualContext, WeakView, WhiteSpace, WindowContext,
 };
 use release_channel::ReleaseChannel;
@@ -743,7 +743,7 @@ impl ExtensionsPage {
             font_family: settings.ui_font.family.clone(),
             font_features: settings.ui_font.features.clone(),
             font_size: rems(0.875).into(),
-            font_weight: FontWeight::NORMAL,
+            font_weight: settings.ui_font.weight,
             font_style: FontStyle::Normal,
             line_height: relative(1.3),
             background_color: None,