feat: add notes feature and keyboard shortcuts

- Introduced a new Note model in the Prisma schema to support note-taking functionality.
- Updated the HeaderNavigation component to include a link to the new Notes page.
- Implemented keyboard shortcuts for note actions, enhancing user experience and productivity.
- Added dependencies for markdown rendering and formatting tools to support note content.

src/app/api/notes/route.ts

@@ -0,0 +1,73 @@
+import { NextResponse } from 'next/server';
+import { notesService } from '@/services/notes';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/lib/auth';
+
+/**
+ * API route pour récupérer toutes les notes de l'utilisateur connecté
+ */
+export async function GET(request: Request) {
+  try {
+    const session = await getServerSession(authOptions);
+
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { searchParams } = new URL(request.url);
+    const search = searchParams.get('search');
+
+    let notes;
+    if (search) {
+      notes = await notesService.searchNotes(session.user.id, search);
+    } else {
+      notes = await notesService.getNotes(session.user.id);
+    }
+
+    return NextResponse.json({ notes });
+  } catch (error) {
+    console.error('Error fetching notes:', error);
+    return NextResponse.json(
+      { error: 'Failed to fetch notes' },
+      { status: 500 }
+    );
+  }
+}
+
+/**
+ * API route pour créer une nouvelle note
+ */
+export async function POST(request: Request) {
+  try {
+    const session = await getServerSession(authOptions);
+
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const body = await request.json();
+    const { title, content, tags } = body;
+
+    if (!title || !content) {
+      return NextResponse.json(
+        { error: 'Title and content are required' },
+        { status: 400 }
+      );
+    }
+
+    const note = await notesService.createNote({
+      title,
+      content,
+      userId: session.user.id,
+      tags,
+    });
+
+    return NextResponse.json({ note }, { status: 201 });
+  } catch (error) {
+    console.error('Error creating note:', error);
+    return NextResponse.json(
+      { error: 'Failed to create note' },
+      { status: 500 }
+    );
+  }
+}