README: update feature list

README.md

@@ -6,9 +6,13 @@
 ### Current features
 - Logging in
 - Fully playable prologue
+- HollowDeepDive with Combat and Rally commissions
+- Archive (playable cutscenes and battles)
+- Open world
+- World exploration with any character (can be changed with a command)
 - Player progress saving with PostgreSQL
-- Unlock all characters
-- Training battle
+- Player management command system
+- Training
 
 ### Requirements
 - [Rust](https://www.rust-lang.org/tools/install)