Add PT-BR translations (#456)

* Translate final.md, hello_world.md, README.md, ROADMAP.md and SUMMARY.md

* Translatation complete

* Internationalization: move guide to en folder and preserve its history. (#494)

* Clean files and build mdBook with localization feature

* Rebase, remove leftovers and check book builds for every language: ✅

Co-authored-by: Jon Kelley <jkelleyrtp@gmail.com>

docs/guide/src/en/getting_started/mobile.md

@@ -71,4 +71,4 @@ fn app(cx: Scope) -> Element {
         }
     })
 }
-```
+```

docs/guide/src/en/getting_started/ssr.md

@@ -106,4 +106,4 @@ async fn app_endpoint() -> Html<String> {
 
 And that's it!
 
-> You might notice that you cannot hold the VirtualDom across an await point. Dioxus is currently not ThreadSafe, so it _must_ remain on the thread it started. We are working on loosening this requirement.
+> You might notice that you cannot hold the VirtualDom across an await point. Dioxus is currently not ThreadSafe, so it _must_ remain on the thread it started. We are working on loosening this requirement.