Add content to English features page

docs/en/features/README.md

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-# layout: BlogHome
+# icon: home
-icon: home
 title: Features
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-tagLine: 
-# actions:
-#   - text: Demo
-#     link: https://stage.ocelot.social/
 ---
-## XXX
 
-XXX
+*Ocelot.social* offers a growing variety of basic and advanced networking features that can be expanded through community [donations](/en/donate/).
+
+The following features have been integrated so far:
+
+## Users
+
+<!-- XXX translate check: start with capital letters -->
+
+- user registration
+- user profile
+- create post
+- follow user
+- block user
+- mute user
+- invite user
+- report user, post or comment
+- user roles: user, moderator, administrator
+
+## Groups
+
+<!-- XXX translate check: start with capital letters -->
+
+- group profile
+- visibility: public, closed, hidden
+- group user roles: member, administrator, owner
+- manage members: invite, activate, delete
+
+## Posts
+
+- post types: Post, event
+- post image
+- extensive editor with headings, text styles, embedded third-party content, lists, mentions, hashtags
+- categories
+- post language (automatic detection)
+- commenting
+
+## Post overview
+
+- preview (newsfeed)
+- filter
+- sort
+
+## Chat
+
+- private 1:1 chat: full screen or side window
+
+## Map
+
+- locations of users, groups and events
+- search by location
+
+## Search
+
+- by users, groups, posts, events, hashtags
+
+## Notifications
+
+- internal
+- by e-mail
+
+## Moderation
+
+Users with the moderator role can:
+
+- moderate
+- view and edit list of reported users, posts, comments
+- block and unblock users, posts or comments
+- view decision log
+
+## Administration
+
+Users with the administrator role can also:
+
+- pin posts to the top of the post overview (newsfeed)
+- view statistics
+- view user data (except passwords)
+- activate donation function with donation status
+
+## Languages
+
+The user interface is available in:
+
+- Dutch
+- English
+- French
+- German
+- Italian
+- Polish
+- Portuguese
+- Russian
+- Spanish
+
+## Mobile App
+
+*Ocelot.social* networks is available as a so-called Progressive Web App (PWA) for:
+
+- Android
+- iOS
+
+→ [Instructions in the wiki](https://github.com/Ocelot-Social-Community/Ocelot-Social/wiki/en:FAQ#is-there-a-mobile-app)
+
+## Donate
+
+The *ocelot.social* network software is freely available – but maintenance and further development cost money.
+Your donation supports its continuity:
+
+<!-- markdownlint-disable MD033 -->
+<a href="/en/donate/">
+  <Button class="donate-button">
+    Donate here
+  </Button>
+</a>
+<!-- markdownlint-enable MD033 -->