test(httproute): add comprehensive unit tests and deployment notes

Add helm-unittest test suite for HTTPRoute (Gateway API) covering:
- Not created by default (enabled: false)
- Created when enabled with required configuration
- Annotations support
- parentRefs configuration (name, namespace, sectionName)
- Hostnames support (single and multiple)
- Path matching rules (PathPrefix, Exact)
- Multiple rules and multiple matches per rule
- Backend references to Jellyfin service
- Custom service port handling

Add NOTES.txt with HTTPRoute-specific deployment information:
- Gateway references and configuration status
- Configured hostnames
- Number of routes
- Backend service details
- Access URLs when hostnames configured
- Warnings for missing parentRefs

Tests ensure HTTPRoute works correctly across all Gateway API scenarios.

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

charts/jellyfin/templates/NOTES.txt

@@ -0,0 +1,53 @@
+Thank you for installing {{ .Chart.Name }}.
+
+Your release is named {{ .Release.Name }}.
+
+To learn more about the release, try:
+
+  $ helm status {{ .Release.Name }}
+  $ helm get all {{ .Release.Name }}
+
+{{- if .Values.httpRoute.enabled }}
+
+HTTPRoute (Gateway API) is ENABLED:
+{{- if .Values.httpRoute.parentRefs }}
+  Gateway References:
+  {{- range .Values.httpRoute.parentRefs }}
+    - {{ .name }}{{ if .namespace }} (namespace: {{ .namespace }}){{ end }}{{ if .sectionName }} [{{ .sectionName }}]{{ end }}
+  {{- end }}
+{{- else }}
+  ⚠ WARNING: No parentRefs defined - HTTPRoute will not attach to any Gateway!
+{{- end }}
+{{- if .Values.httpRoute.hostnames }}
+  Hostnames:
+  {{- range .Values.httpRoute.hostnames }}
+    - {{ . }}
+  {{- end }}
+{{- end }}
+  Rules: {{ len .Values.httpRoute.rules }} route(s) configured
+  Backend: {{ include "jellyfin.fullname" . }}:{{ .Values.service.port }}
+
+Access Jellyfin via Gateway API at:
+{{- if .Values.httpRoute.hostnames }}
+{{- range .Values.httpRoute.hostnames }}
+  https://{{ . }}{{ (index $.Values.httpRoute.rules 0).matches 0 .path.value }}
+{{- end }}
+{{- else }}
+  (Configure httpRoute.hostnames for external access)
+{{- end }}
+
+Note: Ensure your Gateway API CRDs are installed and Gateway is configured.
+{{- else if .Values.ingress.enabled }}
+
+Jellyfin is available via Ingress at:
+{{- range .Values.ingress.hosts }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ .host }}{{ (index .paths 0).path }}
+{{- end }}
+{{- else }}
+
+To access Jellyfin, you can use port-forwarding:
+
+  $ kubectl port-forward --namespace {{ .Release.Namespace }} svc/{{ include "jellyfin.fullname" . }} {{ .Values.service.port }}:{{ .Values.service.port }}
+
+Then visit http://localhost:{{ .Values.service.port }} in your browser.
+{{- end }}