feat(preview): expose availability and handle missing services

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

core/src/stores/previewStore.ts

@@ -0,0 +1,36 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+
+export interface PreviewAvailability {
+  enabled: boolean
+  storage: boolean
+  generation: boolean
+}
+
+const unavailable = (): PreviewAvailability => ({
+  enabled: false,
+  storage: false,
+  generation: false,
+})
+
+export const usePreviewStore = defineStore('previewStore', () => {
+  const availability = ref<PreviewAvailability>(unavailable())
+
+  function init(data?: Partial<PreviewAvailability> | null): void {
+    availability.value = {
+      enabled: data?.enabled ?? false,
+      storage: data?.storage ?? false,
+      generation: data?.generation ?? false,
+    }
+  }
+
+  function reset(): void {
+    availability.value = unavailable()
+  }
+
+  return {
+    availability,
+    init,
+    reset,
+  }
+})