feat: add TextWidget

add TextWidget CRUD api

add basic tests for API

app/Models/TextWidget.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class TextWidget extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'title',
+        'description',
+        'content',
+    ];
+}