first styling and store for reactive etape modale

web/themes/custom/caravane/assets/js/stores/etape.js

@@ -0,0 +1,25 @@
+import { defineStore } from 'pinia';
+import REST from '../api/rest-axios';
+
+export const useEtapeStore = defineStore('etape', {
+    state: () => ({
+      etapeData: null,
+      loading: false,
+      error: null,
+    }),
+    actions: {
+      async fetchEtapeData(nid) {
+        this.loading = true;
+        this.error = null;
+        try {
+          const response = await REST.get(`/node/${nid}?_format=json`);
+          this.etapeData = response.data;
+        } catch (error) {
+          this.error = 'Failed to fetch data';
+          console.error('Issue with getNodeData', error);
+        } finally {
+          this.loading = false;
+        }
+      },
+    },
+  });