Revert "Remove cx from ThemeSettings (#38836)" (#39691)

This reverts commit a2a7bd139a.

This caused themes to not load correctly on startup, you needed to edit
your settings.

Release Notes:

- N/A

crates/repl/src/jupyter_settings.rs

@@ -19,7 +19,7 @@ impl JupyterSettings {
 }
 
 impl Settings for JupyterSettings {
-    fn from_settings(content: &settings::SettingsContent) -> Self {
+    fn from_settings(content: &settings::SettingsContent, _cx: &mut App) -> Self {
         let jupyter = content.editor.jupyter.clone().unwrap();
         Self {
             kernel_selections: jupyter.kernel_selections.unwrap_or_default(),

crates/repl/src/repl_settings.rs

@@ -1,3 +1,4 @@
+use gpui::App;
 use settings::Settings;
 
 /// Settings for configuring REPL display and behavior.
@@ -16,7 +17,7 @@ pub struct ReplSettings {
 }
 
 impl Settings for ReplSettings {
-    fn from_settings(content: &settings::SettingsContent) -> Self {
+    fn from_settings(content: &settings::SettingsContent, _cx: &mut App) -> Self {
         let repl = content.repl.as_ref().unwrap();
 
         Self {