Change regional language codes (#8065)

* Change regional language codes

According to `ISO-639-1` and `ISO-3166-1 alpha-2` recommendations, regional
languages must be written with the language code in lowercase and the region
in uppercase. For instance, we should have `en-US` instead of `en-us`.

Folders have been updated to reflect those recommendations and regional
language codes have been updated in the translation files.

* Update README files

* Fix configuration for typos

* Revert language order in documentation

* Remove unnecessary code

* Change language configuration getter

* Fix phpstan error

* Fix typo

* Add types

* escape regex

* Move language logic to avoid magic or deprecated methods

* Minor fix on regex

1 files changed, 110 insertions, 0 deletions

diff --git a/app/i18n/zh-CN/index.php b/app/i18n/zh-CN/index.php
new file mode 100644
index 000000000..33c9998b0
--- /dev/null
+++ b/app/i18n/zh-CN/index.php
@@ -0,0 +1,110 @@
+<?php
+
+/******************************************************************************
+ * Each entry of that file can be associated with a comment to indicate its   *
+ * state. When there is no comment, it means the entry is fully translated.   *
+ * The recognized comments are (comment matching is case-insensitive):        *
+ *   + TODO: the entry has never been translated.                             *
+ *   + DIRTY: the entry has been translated but needs to be updated.          *
+ *   + IGNORE: the entry does not need to be translated.                      *
+ * When a comment is not recognized, it is discarded.                         *
+ ******************************************************************************/
+
+return array(
+	'about' => array(
+		'_' => '关于',
+		'agpl3' => '<a href="https://www.gnu.org/licenses/agpl-3.0.html">AGPL 3</a>',	// IGNORE
+		'bug_reports' => array(
+			'environment_information' => array(
+				'_' => 'System information',	// TODO
+				'browser' => 'Browser',	// TODO
+				'database' => 'Database',	// TODO
+				'server_software' => 'Server software',	// TODO
+				'version_curl' => 'cURL version',	// TODO
+				'version_frss' => 'FreshRSS version',	// TODO
+				'version_php' => 'PHP version',	// TODO
+			),
+		),
+		'bugs_reports' => '报告错误',
+		'documentation' => '文档',
+		'freshrss_description' => 'FreshRSS 是一个自托管的 RSS 聚合服务。 它不仅轻快易用，并且强大又易于配置。',
+		'github' => '<a href="https://github.com/FreshRSS/FreshRSS/issues">GitHub Issues</a>',
+		'license' => '授权',
+		'project_website' => '项目网站',
+		'title' => '关于',
+		'version' => '版本',
+	),
+	'feed' => array(
+		'empty' => '没有文章可以显示。',
+		'received' => array(
+			'before_yesterday' => 'Received before yesterday',	// TODO
+			'today' => 'Received today',	// TODO
+			'yesterday' => 'Received yesterday',	// TODO
+		),
+		'rss_of' => '%s 的订阅源',
+		'title' => '首页',
+		'title_fav' => '收藏',
+		'title_global' => '全局视图',
+	),
+	'log' => array(
+		'_' => '日志',
+		'clear' => '清除日志',
+		'empty' => '日志文件为空',
+		'title' => '日志',
+	),
+	'menu' => array(
+		'about' => '关于 FreshRSS',
+		'before_one_day' => '一天前',
+		'before_one_week' => '一周前',
+		'bookmark_query' => '收藏当前查询',
+		'favorites' => '收藏（%s）',
+		'global_view' => '全局视图',
+		'important' => '重要的订阅',
+		'main_stream' => '首页',
+		'mark_all_read' => '全部设为已读',
+		'mark_cat_read' => '此分类设为已读',
+		'mark_feed_read' => '此订阅源设为已读',
+		'mark_selection_unread' => '将筛选结果标记为未读',
+		'mylabels' => '我的标签',
+		'newer_first' => '由新至旧',
+		'non-starred' => '显示未收藏',
+		'normal_view' => '普通视图',
+		'older_first' => '由旧至新',
+		'queries' => '自定义查询',
+		'read' => '显示已读',
+		'reader_view' => '阅读视图',
+		'rss_view' => '订阅源',
+		'search_short' => '搜索',
+		'sort' => array(
+			'_' => 'Sorting criteria',	// TODO
+			'c' => array(
+				'name_asc' => 'Category, feed titles A→Z',	// TODO
+				'name_desc' => 'Category, feed titles Z→A',	// TODO
+			),
+			'date_asc' => 'Publication date 1→9',	// TODO
+			'date_desc' => 'Publication date 9→1',	// TODO
+			'f' => array(
+				'name_asc' => 'Feed title A→Z',	// TODO
+				'name_desc' => 'Feed title Z→A',	// TODO
+			),
+			'id_asc' => 'Freshly received last',	// TODO
+			'id_desc' => 'Freshly received first',	// TODO
+			'link_asc' => 'Link A→Z',	// TODO
+			'link_desc' => 'Link Z→A',	// TODO
+			'rand' => 'Random order',	// TODO
+			'title_asc' => 'Title A→Z',	// TODO
+			'title_desc' => 'Title Z→A',	// TODO
+		),
+		'starred' => '显示收藏',
+		'stats' => '统计',
+		'subscription' => '订阅管理',
+		'unread' => '显示未读',
+	),
+	'share' => '分享',
+	'tag' => array(
+		'related' => '文章标签',
+	),
+	'tos' => array(
+		'title' => '服务条款',
+	),
+);