add more info

Author: Lulalaby

docs/interactions/Message_Components.md

@@ -986,6 +986,13 @@ Upon resolving by discord, it returns the full object, including metadata about
 |-------|--------|------------------------------------------------------------------|
 | url   | string | Supports arbitrary URLs and `attachment://<filename>` references |
 
+###### Unfurled Media Item Loading State
+| Value | State            |
+|-------|------------------|
+| 0     | Unknown          |
+| 1     | Loading          |
+| 2     | Loaded Success   |
+| 3     | Loaded Not Found |
 
 ###### Resolved Unfurled Media Item Example
 
@@ -1002,3 +1009,14 @@ Upon resolving by discord, it returns the full object, including metadata about
     "flags": 0
 }
 ```
+
+###### Resolved Unfurled Media Item Structure
+
+| Field         | Type    | Description                                                                                     |
+|---------------|---------|-------------------------------------------------------------------------------------------------|
+| url           | string  | source url of media item (only supports http(s) and attachments)                                |
+| proxy_url     | string  | a proxied url of the media item                                                                 |
+| height        | integer | height of media item                                                                            |
+| width         | integer | width of media item                                                                             |
+| content_type  | string  | the media item's [media type](https://en.wikipedia.org/wiki/Media_type)                         |
+| loading_state | integer | [loading state](#DOCS_INTERACTIONS_MESSAGE_COMPONENTS/unfurled-media-item-object-loading-state) |