Manage widget definitions with Pinia store (#1510)

* Fix compile

* nit

* Remove extensions.test

* nit

src/stores/widgetStore.ts

@@ -0,0 +1,45 @@
+import { ComfyWidgets, ComfyWidgetConstructor } from '@/scripts/widgets'
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import type { BaseInputSpec } from './nodeDefStore'
+
+export const useWidgetStore = defineStore('widget', () => {
+  const coreWidgets = ComfyWidgets
+  const customWidgets = ref<Record<string, ComfyWidgetConstructor>>({})
+  const widgets = computed(() => ({
+    ...customWidgets.value,
+    ...coreWidgets
+  }))
+
+  function getWidgetType(type: string, inputName: string) {
+    if (type === 'COMBO') {
+      return 'COMBO'
+    } else if (`${type}:${inputName}` in widgets.value) {
+      return `${type}:${inputName}`
+    } else if (type in widgets.value) {
+      return type
+    } else {
+      return null
+    }
+  }
+
+  function inputIsWidget(spec: BaseInputSpec) {
+    return getWidgetType(spec.type, spec.name) !== null
+  }
+
+  function registerCustomWidgets(
+    newWidgets: Record<string, ComfyWidgetConstructor>
+  ) {
+    customWidgets.value = {
+      ...customWidgets.value,
+      ...newWidgets
+    }
+  }
+
+  return {
+    widgets,
+    getWidgetType,
+    inputIsWidget,
+    registerCustomWidgets
+  }
+})