feat(gateway-api): add HTTPRoute support

Add support for Kubernetes Gateway API HTTPRoute resource as a modern
alternative to Ingress. The implementation follows the same pattern as
the existing Ingress template.

Changes:
- Add HTTPRoute template with configurable parentRefs, hostnames, and rules
- Add httpRoute section to values.yaml with generic examples
- Update Chart version from 2.5.0 to 2.6.0
- Add Artifact Hub changelog annotation
- Add HTTPRoute documentation to README

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Aleksei Sviridkin <f@lex.la>

charts/jellyfin/Chart.yaml

@@ -8,5 +8,9 @@ keywords:
   - jellyfin
   - media
   - self-hosted
-version: 2.5.0
+version: 2.6.0
 appVersion: 10.11.2
+annotations:
+  artifacthub.io/changes: |
+    - kind: added
+      description: Add support for Gateway API HTTPRoute resource