finish router refrence

docs/router/src/SUMMARY.md

@@ -10,3 +10,16 @@
 - [Navigation Targets](./example/navigation-targets.md)
 - [Redirection Perfection](./example/redirection-perfection.md)
 - [Full Code](./example/full-code.md)
+
+# Reference
+
+- [Adding the Router to Your Application](./reference/index.md)
+- [Defining Routes](./reference/routes/index.md)
+  - [Nested Routes](./reference/routes/nested.md)
+- [Layouts](./reference/layouts.md)
+- [Navigation](./reference/navigation/index.md)
+  - [Programmatic Navigation](./reference/navigation/programmatic.md)
+- [History Providers](./reference/history-providers.md)
+- [History Buttons](./reference/history-buttons.md)
+- [Static Generation](./reference/static-generation.md)
+- [Routing Update Callback](./reference/routing-update-callback.md)