improve project dialog system

- project model : refactor getSteps() method
- create dialog store
- create DialogWrapper component that open the dialog corresponding to the URL query param

src/stores/dialog.js

@@ -0,0 +1,8 @@
+import { defineStore } from "pinia";
+import { ref } from "vue";
+
+export const useDialogStore = defineStore("dialog", () => {
+  const content = ref(null);
+
+  return { content };
+});