docs: sync code blocks and generate API reference (#187)

Synced from agent-sdk ref: main

Co-authored-by: xingyaoww <38853559+xingyaoww@users.noreply.github.com>

Author: github-actions[bot]

sdk/api-reference/openhands.sdk.conversation.mdx

@@ -163,6 +163,8 @@ Enum representing the current execution state of the conversation.
 
 #### Methods
 
+#### DELETING = 'deleting'
+
 #### ERROR = 'error'
 
 #### FINISHED = 'finished'