docs(user-guide): Mv tips to user-guide

Author: alukach

docs/tips.md renamed to docs/user-guide/tips.md

@@ -33,10 +33,10 @@ nav:
   - Configuration: configuration.md
   - User Guide:
       - Route-Level Auth: user-guide/route-level-auth.md
+      - Tips: tips.md
   - Architecture:
       - Middleware Stack: architecture/middleware-stack.md
       - Data Filtering: architecture/data-filtering.md
-  - Tips: tips.md
 
 plugins:
   - search