add nova resources

app/Modules/IncomingLetter/Database/Migrations/2024_10_22_152424_create_incoming_letters_table.php

@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('incoming_letters', function (Blueprint $table) {
+            $table->id();
+            $table->string('number')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('incoming_letters');
+    }
+};