More class based handlers

docs/dispatcher/class_based_handlers/inline_query.md

@@ -0,0 +1,27 @@
+# InlineQueryHandler
+There is base class for inline query handlers.
+
+## Simple usage:
+```pyhton3
+from aiogram.handlers import InlineQueryHandler
+
+...
+
+@router.inline_query_handler()
+class MyHandler(InlineQueryHandler):
+    async def handle(self) -> Any: ...
+
+```
+
+## Extension
+
+This base handler is subclass of [BaseHandler](basics.md#basehandler) with some extensions:
+
+- `self.chat` is alias for `self.event.chat`
+- `self.query` is alias for `self.event.query`
+
+## Related pages
+
+- [BaseHandler](basics.md#basehandler)
+- [InlineQuery](../../api/types/inline_query.md)
+- [Router.inline_query_handler](../router.md#inline-query)