Created Feature: Room State Management (markdown)

Feature:-Room-State-Management.md

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+# Room State Management
+
+Planning and design of the room state management "feature."
+
+* The bot must keep track of rooms it is in, and what users are in each room.
+
+## Bot Changes
+
+Listen to Matrix event for when users enter and leave rooms. When accepting an invite, also download user list (maybe this is a separate event?)
+
+## Database Changes
+
+New DB object `Rooms`. Trees for room -> list of users, and maybe user -> list of rooms. We need user -> list of rooms for easy implementation of private conversation command execution.