add DisciplinaQuery

app/Queries/DisciplinaQuery.php

+<?php
+
+namespace App\Queries;
+
+use App\Models\Disciplina;
+use App\Queries\Query;
+
+class DisciplinaQuery extends Query {
+
+    public function __construct($init = []) {
+        $this->query = Disciplina::where($init);
+    }
+
+    /**
+     * @param integer|string $curso_id
+     * @param string $expression 
+     * @return Builder
+     */
+    public function whereCursoId($curso_id, string $expression = '=') {
+        $this->query->where('curso_id', $expression, $curso_id);
+        return $this->query;
+    }
+
+}
\ No newline at end of file