add Period resource

database/migrations/2024_02_26_080134_create_periods_table.php

@@ -14,7 +14,7 @@ return new class extends Migration
         Schema::create('periods', function (Blueprint $table) {
             $table->id();
             $table->integer('position');
-            $table->integer('period');
+            $table->float('period');
             $table->foreignId('education_form_id')->constrained('education_forms');
             $table->foreignId('direction_id')->constrained('directions');
             $table->text('description')->nullable();