replace mdx imports with their actual content on dev docs (#10740)

* replace mdx imports with their actual content on dev docs

* remove definition list syntax

Author: a-hariti

develop-docs/sdk/event-payloads/index.mdx

@@ -37,7 +37,16 @@ time when it occurred.
 
 The following attributes are required for all events.
 
-import "./properties/event_id.mdx"
+`event_id`
+
+_Required_. Hexadecimal string representing a uuid4 value. The length is exactly 32
+  characters. Dashes are not allowed. Has to be lowercase.
+
+  ```json
+  {
+    "event_id": "fc6d8c0c43fc4630ad850ee518f1b9d0"
+  }
+  ```
 
 `timestamp`
 
@@ -187,7 +196,18 @@ of an Xcode build or the version code of an Android build.
 }
 ```
 
-import "./properties/tags.mdx"
+`tags`
+
+_Optional_. A map or list of tags for this event. Each tag must be less than 200 characters.
+
+  ```json
+  {
+    "tags": {
+      "ios_version": "4.0",
+      "context": "production"
+    }
+  }
+  ```
 
 `environment`