added simulations and quickstart

Author: Noah Raynor

fern/docs.yml

@@ -289,6 +289,12 @@ navigation:
               - page: Advanced
                 path: observability/evals-advanced.mdx
                 icon: fa-light fa-clipboard-check
+          - section: Simulations
+            icon: fa-light fa-flask-vial
+            contents:
+              - page: Quickstart
+                path: observability/simulations-quickstart.mdx
+                icon: fa-light fa-rocket
           - page: Boards
             path: observability/boards-quickstart.mdx
             icon: fa-light fa-chart-line