Build offline documentation using Hugo and other improvements

* Allow to build the documentation offline using Hugo
* Fix link problems
* Remove SVN entities
* Fix lang problems to help weblate
* Move all the AsciiDoctor translations to the shared folder to
  help weblate
* Allow the possibility to build each document. For example each
document can be edited in and watched the result in real time in
VS Code or Vim/NeoVim.

Breaking changes:

Eliminate the possibility of building books or articles.
They must be builded at the same time.
This functionality will be restored when version 0.89.0 is in the
repositories in a couple of weeks.

Reviewed by:            dbaio@
Differential Revision:  https://reviews.freebsd.org/D31926

1 files changed, 21 insertions, 23 deletions

diff --git a/documentation/content/ru/books/handbook/filesystems/_index.adoc b/documentation/content/ru/books/handbook/filesystems/_index.adoc
index a4dbb0283e..732d7dcfb1 100644
--- a/documentation/content/ru/books/handbook/filesystems/_index.adoc
+++ b/documentation/content/ru/books/handbook/filesystems/_index.adoc
@@ -13,37 +13,35 @@ next: books/handbook/l10n
 :icons: font
 :sectnums:
 :sectnumlevels: 6
+:sectnumoffset: 19
+:partnums:
 :source-highlighter: rouge
 :experimental:
-:skip-front-matter:
-:toc-title: Содержание
-:table-caption: Таблица
-:figure-caption: Рисунок
-:example-caption: Пример
-:xrefstyle: basic
-:relfileprefix: ../
-:outfilesuffix:
-:sectnumoffset: 19
-
-ifeval::["{backend}" == "html5"]
-:imagesdir: ../../../images/books/handbook/filesystems/
-endif::[]
-
-ifeval::["{backend}" == "pdf"]
-:imagesdir: ../../../../static/images/books/handbook/filesystems/
-endif::[]
+:images-path: books/handbook/filesystems/
 
-ifeval::["{backend}" == "epub3"]
-:imagesdir: ../../../../static/images/books/handbook/filesystems/
+ifdef::env-beastie[]
+ifdef::backend-html5[]
+:imagesdir: ../../../../images/{images-path}
 endif::[]
-
+ifndef::book[]
 include::shared/authors.adoc[]
+include::shared/mirrors.adoc[]
 include::shared/releases.adoc[]
-include::shared/ru/mailing-lists.adoc[]
-include::shared/ru/teams.adoc[]
-include::shared/ru/urls.adoc[]
+include::shared/attributes/attributes-{{% lang %}}.adoc[]
+include::shared/{{% lang %}}/teams.adoc[]
+include::shared/{{% lang %}}/mailing-lists.adoc[]
+include::shared/{{% lang %}}/urls.adoc[]
+toc::[]
+endif::[]
+ifdef::backend-pdf,backend-epub3[]
+include::../../../../../shared/asciidoctor.adoc[]
+endif::[]
+endif::[]
 
+ifndef::env-beastie[]
 toc::[]
+include::../../../../../shared/asciidoctor.adoc[]
+endif::[]
 
 [[filesystems-synopsis]]
 == Краткий обзор