feat: add multilingual mode support (#241)

BREAKING CHANGE:  Layout file renamed ´layouts/partials/page-footer.html → layouts/partials/menu-nextprev.html`. If you use overrides, you might need to change the filenames as well.

i18n/de.yaml

@@ -0,0 +1,39 @@
+---
+edit_page: Seite bearbeiten
+
+nav_navigation: Navigation
+nav_tags: Tags
+nav_more: Weitere
+nav_top: Nach oben
+
+form_placeholder_search: Suchen
+
+error_page_title: Verlaufen? Keine Sorge
+error_message_title: Verlaufen?
+error_message_code: Fehler 404
+error_message_text: >
+  Wir können die Seite nach der Du gesucht hast leider nicht finden. Keine Sorge,
+  wir bringen Dich zurück zur <a class="gdoc-error__link" href="{{ . }}">Startseite</a>.
+
+button_toggle_dark: Wechsel zwischen Dunkel/Hell/Auto Modus
+button_nav_open: Navigation öffnen
+button_nav_close: Navigation schließen
+button_menu_open: Menüband öffnen
+button_menu_close: Menüband schließen
+button_homepage: Zurück zur Startseite
+
+title_anchor_prefix: "Link zu:"
+
+posts_read_more: Ganzen Artikel lesen
+posts_read_time:
+  one: "Eine Minute Lesedauer"
+  other: "{{ . }} Minuten Lesedauer"
+posts_update_prefix: Aktualisiert am
+
+footer_build_with: >
+  Entwickelt mit <a href="https://gohugo.io/" class="gdoc-footer__link">Hugo</a> und
+  <svg class="icon gdoc_heart"><use xlink:href="#gdoc_heart"></use></svg>
+footer_legal_notice: Impressum
+footer_privacy_policy: Datenschutzerklärung
+
+language_switch_no_tranlation_prefix: "Seite nicht übersetzt:"

i18n/en.yaml

@@ -0,0 +1,39 @@
+---
+edit_page: Edit page
+
+nav_navigation: Navigation
+nav_tags: Tags
+nav_more: More
+nav_top: Back to top
+
+form_placeholder_search: Search
+
+error_page_title: Lost? Don't worry
+error_message_title: Lost?
+error_message_code: Error 404
+error_message_text: >
+  Seems like what you are looking for can't be found. Don't worry, we can
+  bring you back to the <a class="gdoc-error__link" href="{{ . }}">homepage</a>.
+
+button_toggle_dark: Toggle Dark/Light/Auto mode
+button_nav_open: Open Navigation
+button_nav_close: Close Navigation
+button_menu_open: Open Menu Bar
+button_menu_close: Close Menu Bar
+button_homepage: Back to homepage
+
+title_anchor_prefix: "Anchor to:"
+
+posts_read_more: Read full post
+posts_read_time:
+  one: "One minute to read"
+  other: "{{ . }} minutes to read"
+posts_update_prefix: Updated on
+
+footer_build_with: >
+  Built with <a href="https://gohugo.io/" class="gdoc-footer__link">Hugo</a> and
+  <svg class="icon gdoc_heart"><use xlink:href="#gdoc_heart"></use></svg>
+footer_legal_notice: Legal Notice
+footer_privacy_policy: Privacy Policy
+
+language_switch_no_tranlation_prefix: "Page not translated:"