fix(ffi): Add requested improvements

bindings/matrix-sdk-ffi/src/room.rs

@@ -384,19 +384,17 @@ impl Room {
     ///
     /// * `event_type` - The type of the event to send.
     ///
-    /// * `content` - The content of the event to send as JSON string.
-    pub async fn send_custom_event(
+    /// * `content` - The content of the event to send encoded as JSON string.
+    pub async fn send_raw(
         &self,
         event_type: String,
         content: String,
     ) -> Result<(), ClientError> {
-        let content_json: serde_json::Value = match serde_json::from_str(&content) {
-            Ok(json) => json,
-            Err(e) => {
-                return Err(ClientError::Generic { msg: format!("Failed to parse JSON: {}", e) })
-            }
-        };
+        let content_json: serde_json::Value = serde_json::from_str(&content)
+            .map_err(|e| ClientError::Generic { msg: format!("Failed to parse JSON: {e}") })?;
+
         self.inner.send_raw(&event_type, content_json).await?;
+
         Ok(())
     }