[UI][CONTROLLER][ENTITY][DOCS] Refactor term 'timeline' into 'feed'

docs/administrator/src/install/no_docker_shell.md

@@ -156,7 +156,7 @@ especially if you've previously installed PHP packages.
 {{#include bin-configure.md}}
   
  7. You should now be able to navigate to your social site's main directory
-    and see the "Public Timeline", which will probably be empty. You can
+    and see the "Public Feed", which will probably be empty. You can
     now register new user, post some notices, edit your profile, etc.
 
 ### Fancy URLs

docs/user/src/SUMMARY.md

@@ -2,7 +2,7 @@
 
 - [What is GNU social](./what_is.md)
 - [The IndieWeb](./indieweb.md)
-- [Timelines](./timelines.md)
+- [Feeds](./feeds.md)
 - [Getting Started]()
   - [Choosing an instance](./getting_started/choosing_an_instance.md)
   - [Registering an account](./getting_started/register.md)

docs/user/src/feeds.md

@@ -1,4 +1,4 @@
-# Timelines
+# Feeds
 
 Communication became cheap. Everyone wants to share information.
 However, people aren't interested in consuming everyone's information.

docs/user/src/what_is.md

@@ -2,7 +2,7 @@
 
 GNU social is a social network platform for communities. It enables you to publish
 short notes including URLs and pictures. If you're interested in what someone has
-to say you can subscribe them. When you log in to your account you see a timeline
+to say you can subscribe them. When you log in to your account you see a feed
 containing all the notes from people, groups and tags you subscribed.
 You can have a conversation with another person by replying to each other's notes.