Migration to Nuxt v4 file structure and dependencies update

app/types/general.d.ts

@@ -0,0 +1,21 @@
+export type Preferences = {
+    markdown: MarkdownPreferences,
+    canvas: CanvasPreferences,
+} & GeneralPreferences;
+
+type GeneralPreferences = {
+
+};
+type MarkdownPreferences = {
+    editing: 'split' |'reading' | 'editing';
+};
+type CanvasPreferences = {
+    gridSnap: boolean;
+    spacing?: number;
+    neighborSnap: boolean;
+};
+export type Localized = {
+    fr_FR?: string;
+    en_US?: string;
+    default: string;
+}