feat: Initial commit for Saqel Platform architecture, backend, Docker, and documentation

backend/database/factories/ConceptFactory.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Database\Factories;
+
+use App\Models\Concept;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends Factory<Concept>
+ */
+class ConceptFactory extends Factory
+{
+    public function definition(): array
+    {
+        return [
+            'subject_id' => SubjectFactory::new(),
+            'name' => fake()->unique()->words(2, true),
+        ];
+    }
+}