fix(ci): add prebuild step before typecheck

The navigation.ts file is generated during prebuild and is required
for typecheck to pass.

Author: vredchenko

.github/workflows/ci.yml

@@ -31,6 +31,9 @@ jobs:
       - name: Lint
         run: npm run lint
 
+      - name: Prebuild (generate navigation)
+        run: npm run prebuild
+
       - name: Type check
         run: npm run typecheck