add option to launch legacy version of the game & fix epic games launch urls

src/gui/app.rs

@@ -95,7 +95,7 @@ impl App {
         ui.header("Game");
         ui.horizontal(|ui| {
             if ui.button("Launch").clicked() {
-                features::launch::launch(&self.launch.selected);
+                features::launch::launch(&self.launch.selected, &self.settings.launch_version);
             }
             egui::ComboBox::from_id_salt("Launch")
                 .selected_text(self.launch.selected.to_string())
@@ -190,6 +190,14 @@ impl App {
     }
 
     fn show_settings_stage(&mut self, ctx: &egui::Context, ui: &mut egui::Ui) {
+        ui.horizontal(|ui| {
+            ui.label("Launch version");
+            egui::ComboBox::from_id_salt("Launch version")
+                .selected_text(self.settings.launch_version.to_string())
+                .show_ui(ui, |ui| {
+                    ui.build_menu(&mut self.settings.launch_version);
+                });
+        });
         ui.horizontal(|ui| {
             let selection = self.settings.theme;
             ui.label("Theme");

src/gui/settings.rs

@@ -2,6 +2,13 @@ use crate::util::win;
 use serde::{Deserialize, Serialize};
 use strum::{Display, EnumIter};
 
+#[derive(Clone, Copy, Debug, Default, Display, PartialEq, Eq, Serialize, Deserialize, EnumIter)]
+pub enum LaunchVersion {
+    #[default]
+    Enhanced,
+    Legacy,
+}
+
 #[derive(Clone, Copy, Debug, Default, Display, PartialEq, Eq, Serialize, Deserialize, EnumIter)]
 pub enum Theme {
     #[default]
@@ -37,6 +44,7 @@ impl From<Theme> for catppuccin_egui::Theme {
 
 #[derive(Clone, Debug, Default, Serialize, Deserialize)]
 pub struct Settings {
+    pub launch_version: LaunchVersion,
     pub theme: Theme,
     pub start_elevated: bool,
 }