docs(users): 📝 add docs for search users

Author: MerleLiuKun

docs/docs/usage/users/search.md

@@ -0,0 +1,12 @@
+The Users Search endpoint provides a simple, relevance-based search interface to public user accounts on X. Try querying by topical interest, full name, company name, location, or other criteria.
+
+You can get more information for this at [docs](https://developer.twitter.com/en/docs/twitter-api/users/search/introduction)
+
+## Search Users
+
+Get users that match a search query.
+
+```python
+my_api.search_users(query="developers")
+# Response(data=[User(id='866707894389141505', name='Refinitiv Developers', username='Developers'), User(id='2244994945', name='Developers', username='XDevelopers')])
+```

docs/mkdocs.yml

@@ -53,6 +53,7 @@ nav:
           - Follows: usage/users/follows.md
           - Blocks: usage/users/blocks.md
           - Mutes: usage/users/mutes.md
+          - Search: usage/users/search.md
       - Spaces:
           - Spaces Lookup: usage/spaces/spaces-lookup.md
           - Search Spaces: usage/spaces/search.md