docs(showcase): add tickserv.com (#6869)

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Co-authored-by: Benjamin Canac <canacb1@gmail.com>

Author: 3 people

docs/content/showcase.yml

@@ -73,6 +73,8 @@ items:
     url: https://www.thecompaniesapi.com/
   - name: Thuprai
     url: https://thuprai.com/
+  - name: TickServ
+    url: https://tickserv.com/
   - name: TresJS
     url: https://tresjs.org/
   - name: Triad Trainer