Add Joomla-aware development workflows and scripts

- Created extension packaging script
- Added PHPStan configuration for static analysis
- Added PHP_CodeSniffer configuration with Joomla standards
- Created Codeception testing framework setup
- Added PHP quality check workflow
- Added Joomla testing workflow with multiple versions
- Added staging deployment workflow
- Created comprehensive documentation
- Set up test directory structure with sample tests

Co-authored-by: jmiller-moko <230051081+jmiller-moko@users.noreply.github.com>

tests/acceptance/TemplateInstallationCest.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Tests\Acceptance;
+
+use Tests\Support\AcceptanceTester;
+
+/**
+ * Sample acceptance test for template installation
+ */
+class TemplateInstallationCest
+{
+    /**
+     * Test that template files exist
+     */
+    public function checkTemplateFilesExist(AcceptanceTester $I)
+    {
+        $I->wantTo('verify template files are present');
+        
+        // This is a placeholder test
+        // Actual tests should be implemented based on your Joomla installation
+        $I->assertTrue(true, 'Template structure test placeholder');
+    }
+}