feat/localization (#104)

* initial i18n setup for PWSP-GUI

* add Russian locale

* add missing entries

* add Spanish locale

* add French locale

* add Chinese locale

* add Arabic locale

* update cargo-sources.json

src/main.rs

@@ -1,8 +1,14 @@
 mod gui;
 
 use anyhow::Result;
+use rust_i18n::i18n;
+
+i18n!("locales", fallback = "en");
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    gui::run().await
+    let locale = sys_locale::get_locale().unwrap_or(String::from("en-US"));
+    rust_i18n::set_locale(&locale);
+
+    gui::run().await    
 }