✨ New appendix for translations.

Linked to #26 and #63.

Author: Jimskapt

src/12_appendix/01_translations.md

@@ -0,0 +1,6 @@
+# Appendix : Translations of the Book
+
+For resources in languages other than English.
+
+- [Русский](https://doc.rust-lang.ru/async-book/)
+- [Français](https://jimskapt.github.io/async-book-fr/)

src/SUMMARY.md

@@ -34,3 +34,4 @@
 - [TODO: Asynchronous Design Patterns: Solutions and Suggestions]()
   - [TODO: Modeling Servers and the Request/Response Pattern]()
   - [TODO: Managing Shared State]()
+- [Appendix: Translations of the Book](12_appendix/01_translations.md)