chore(store): add AppSettings example (#573)

* basic example foundation

* add examples to workspace

* cleanup and load fix

* fmt

* reset lockfile

---------

Co-authored-by: FabianLars <fabianlars@fabianlars.de>

plugins/store/examples/AppSettingsManager/src-tauri/src/app/mod.rs

@@ -0,0 +1 @@
+pub mod settings;

plugins/store/examples/AppSettingsManager/src-tauri/src/app/settings.rs

@@ -0,0 +1,29 @@
+use tauri_plugin_store::Store;
+
+#[derive(Debug, Clone)]
+pub struct AppSettings {
+    pub launch_at_login: bool,
+    pub theme: String,
+}
+
+impl AppSettings {
+    pub fn load_from_store<R: tauri::Runtime>(
+        store: &Store<R>,
+    ) -> Result<Self, Box<dyn std::error::Error>> {
+        let launch_at_login = store
+            .get("appSettings.launchAtLogin")
+            .and_then(|v| v.as_bool())
+            .unwrap_or(false);
+
+        let theme = store
+            .get("appSettings.theme")
+            .and_then(|v| v.as_str())
+            .map(|s| s.to_string())
+            .unwrap_or_else(|| "dark".to_string());
+
+        Ok(AppSettings {
+            launch_at_login,
+            theme,
+        })
+    }
+}

plugins/store/examples/AppSettingsManager/src-tauri/src/main.rs

@@ -0,0 +1,40 @@
+// Prevents additional console window on Windows in release, DO NOT REMOVE!!
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+use tauri_plugin_store::StoreBuilder;
+
+mod app;
+use app::settings::AppSettings;
+
+fn main() {
+    tauri::Builder::default()
+        .plugin(tauri_plugin_store::Builder::default().build())
+        .setup(|app| {
+            // Init store and load it from disk
+            let mut store = StoreBuilder::new(app.handle(), "settings.json".parse()?).build();
+
+            // If there are no saved settings yet, this will return an error so we ignore the return value.
+            let _ = store.load();
+
+            let app_settings = AppSettings::load_from_store(&store);
+
+            match app_settings {
+                Ok(app_settings) => {
+                    let theme = app_settings.theme;
+                    let launch_at_login = app_settings.launch_at_login;
+
+                    println!("theme {}", theme);
+                    println!("launch_at_login {}", launch_at_login);
+
+                    Ok(())
+                }
+                Err(err) => {
+                    eprintln!("Error loading settings: {}", err);
+                    // Handle the error case if needed
+                    Err(err) // Convert the error to a Box<dyn Error> and return Err(err) here
+                }
+            }
+        })
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}