feat(homepage): list forte_drop in Apps (#16)

Adds forte_drop as an external service entry in the upc-dev Homepage portal.

- Target host: https://drop.hackathon.forteapps.net (current Coolify deploy).
- One-line addition under `services > Apps` in `infra/values/upc-dev/homepage-values.yaml`.
- Will be retargeted to https://drop.forteapps.net once the K8s migration ships (spec in forte_drop repo: docs/superpowers/specs/2026-05-28-k8s-migration-design.md).

Zero risk — pure metadata, no cluster mutation beyond Homepage refresh.

Co-authored-by: Sten <sten@Mac.domain_not_set.invalid>
Reviewed-on: #16
Reviewed-by: Danijel Simeunovic <danijel.simeunovic@fortedigital.com>

infra/values/upc-dev/homepage-values.yaml

@@ -59,6 +59,10 @@ config:
         href: https://benken.hackathon.forteapps.net
         description: Teknisk kompetanse fra offentlige anbud
         icon: forte
+    - Forte Drop:
+        href: https://drop.hackathon.forteapps.net
+        description: Self-hosted HTML-drops + MCP for Claude
+        icon: forte
     - Forte Feedback:
         href: https://feedback.forteapps.net
         description: Fortes internal feedback app