Translations and i18n (#60)

* Managing i18n

* Fix absolute path

* Config files

* Home link manage langage

* Fixing footer i18n

* Implemented i18n on newsletter

* Implemented two languages in example

* Removed old section directory

* Using yaml in data to organize home summary

* Fully working for old versions without i18n

* Integrating language menu CSS

* Fix language dropdown CSS

* Refactor translation codes

* Remove duplicate code

* Fix URL issues

* Move customMenus and other site related config into data section

* Fix error during language toggle

* Only show the available translation for the posts

* Handle navbar brand URL properly

* Fix responsiveness

Co-authored-by: Hugo MARTIN <hugo.martin.69@gmail.com>
Co-authored-by: hossainemruz <emruz@appscode.com>

layouts/partials/sections/achievements/entry.html

@@ -1,6 +1,6 @@
 <div
   class="achievement-entry text-center"
-  style="background-image: url({{ .image }});"
+  style="background-image: url({{ .image | absURL }});"
 >
   <i class="fas fa-search-plus" id="enlarge-icon"></i>
   <h4 class="title" id="achievement-title">{{ .title }}</h4>