Initial commit: EifelDC - Discord-like Matrix chat platform

Includes server (Rust/Axum API proxy with voice management),
Tauri desktop client with Svelte UI, bot-sdk, Docker infra
(Synapse, PostgreSQL, Coturn, Nginx), and CI/CD pipeline.

bot-sdk/src/room.rs

@@ -0,0 +1,38 @@
+use std::collections::HashMap;
+
+#[derive(Clone)]
+pub struct RoomInfo {
+    pub room_id: String,
+    pub name: String,
+    pub is_encrypted: bool,
+}
+
+pub struct RoomManager {
+    rooms: HashMap<String, RoomInfo>,
+}
+
+impl RoomManager {
+    pub fn new() -> Self {
+        Self { rooms: HashMap::new() }
+    }
+
+    pub fn add_room(&mut self, room: RoomInfo) {
+        self.rooms.insert(room.room_id.clone(), room);
+    }
+
+    pub fn remove_room(&mut self, room_id: &str) {
+        self.rooms.remove(room_id);
+    }
+
+    pub fn get_room(&self, room_id: &str) -> Option<&RoomInfo> {
+        self.rooms.get(room_id)
+    }
+
+    pub fn list_rooms(&self) -> Vec<&RoomInfo> {
+        self.rooms.values().collect()
+    }
+
+    pub fn room_count(&self) -> usize {
+        self.rooms.len()
+    }
+}