chore: add spec-kit and standardize signatures

- Added GitHub spec-kit for development workflow
- Standardized file signatures to Descomplicar® format
- Updated development configuration

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

care-booking-block/tests/bootstrap.php

@@ -0,0 +1,57 @@
+/**
+ * Descomplicar® Crescimento Digital
+ * https://descomplicar.pt
+ */
+
+<?php
+/**
+ * PHPUnit bootstrap file for Care Booking Block plugin
+ *
+ * @package CareBookingBlock
+ */
+
+// Define test environment
+define('CARE_BOOKING_BLOCK_TESTS', true);
+
+// Plugin directory
+$plugin_dir = dirname(dirname(__FILE__));
+
+// WordPress test suite directory
+$wp_tests_dir = getenv('WP_TESTS_DIR') ?: '/tmp/wordpress-tests-lib';
+
+// WordPress core directory for tests
+$wp_core_dir = getenv('WP_CORE_DIR') ?: '/tmp/wordpress/';
+
+// Check if WordPress test suite exists
+if (!file_exists($wp_tests_dir . '/includes/bootstrap.php')) {
+    echo "WordPress test suite not found at: $wp_tests_dir\n";
+    echo "Please install WordPress test suite or set WP_TESTS_DIR environment variable.\n";
+    exit(1);
+}
+
+// Load WordPress test suite functions
+require_once $wp_tests_dir . '/includes/functions.php';
+
+/**
+ * Manually load the plugin for testing
+ */
+function _manually_load_plugin() {
+    global $plugin_dir;
+    require $plugin_dir . '/care-booking-block.php';
+    
+    // Ensure KiviCare plugin functions are available for testing
+    if (!function_exists('is_kivicare_active')) {
+        function is_kivicare_active() {
+            return true; // Mock KiviCare as active for tests
+        }
+    }
+}
+
+// Load plugin before WordPress starts
+tests_add_filter('muplugins_loaded', '_manually_load_plugin');
+
+// Start up the WordPress testing environment
+require $wp_tests_dir . '/includes/bootstrap.php';
+
+// Load plugin test utilities
+require_once $plugin_dir . '/tests/test-utilities.php';