added API documentation and testing

tests/bootstrap.php

@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * Test Bootstrap
+ *
+ * Sets up the testing environment before the framework boots.
+ * Disables the debug toolbar that would wrap JSON API responses in HTML.
+ * The framework's own Test/bootstrap.php handles ENVIRONMENT constant.
+ */
+
+// Disable debug toolbar before the framework defines CI_DEBUG
+defined('CI_DEBUG') || define('CI_DEBUG', false);
+
+// Ensure CI_ENVIRONMENT env var is set (framework checks this)
+putenv('CI_ENVIRONMENT=testing');
+$_SERVER['CI_ENVIRONMENT'] = 'testing';
+
+// Load the framework's test bootstrap (defines ENVIRONMENT constant)
+require __DIR__ . '/../vendor/codeigniter4/framework/system/Test/bootstrap.php';