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/_data/.gitkeep

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+# Test Data Directory
+
+This directory contains test data files such as database dumps and fixtures.
+
+Add your test data files here as needed.

tests/_output/.gitkeep

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+# Test Output Directory
+
+This directory contains test output files and reports generated by Codeception.
+
+Files in this directory are ignored by git and should not be committed.

tests/_support/AcceptanceHelper.php

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+<?php
+
+namespace Tests\Support;
+
+/**
+ * Acceptance test helper class
+ * 
+ * Provides helper methods for acceptance testing
+ */
+class AcceptanceHelper extends \Codeception\Module
+{
+    /**
+     * Custom helper methods can be added here
+     */
+}

tests/_support/UnitHelper.php

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+<?php
+
+namespace Tests\Support;
+
+/**
+ * Unit test helper class
+ * 
+ * Provides helper methods for unit testing
+ */
+class UnitHelper extends \Codeception\Module
+{
+    /**
+     * Custom helper methods can be added here
+     */
+}

tests/acceptance.suite.yml

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+# Codeception Test Suite Configuration
+
+actor: AcceptanceTester
+modules:
+    enabled:
+        - WebDriver:
+            url: http://localhost
+            browser: chrome
+            window_size: 1920x1080
+            capabilities:
+                chromeOptions:
+                    args: ["--headless", "--disable-gpu", "--no-sandbox"]
+        - \Tests\Support\AcceptanceHelper
+step_decorators: ~

tests/acceptance/TemplateInstallationCest.php

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+<?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');
+    }
+}

tests/unit.suite.yml

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+# Codeception Test Suite Configuration
+
+actor: UnitTester
+modules:
+    enabled:
+        - Asserts
+        - \Tests\Support\UnitHelper
+step_decorators: ~

tests/unit/TemplateConfigurationTest.php

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+<?php
+
+namespace Tests\Unit;
+
+use Codeception\Test\Unit;
+use Tests\Support\UnitTester;
+
+/**
+ * Sample unit test for template functionality
+ */
+class TemplateConfigurationTest extends Unit
+{
+    protected UnitTester $tester;
+
+    /**
+     * Test that template has valid configuration structure
+     */
+    public function testTemplateManifestExists()
+    {
+        $manifestPath = __DIR__ . '/../../src/templates/templateDetails.xml';
+        
+        // Check if manifest file exists
+        $this->assertFileExists(
+            $manifestPath,
+            'Template manifest file should exist'
+        );
+    }
+
+    /**
+     * Test that manifest is valid XML
+     */
+    public function testManifestIsValidXml()
+    {
+        $manifestPath = __DIR__ . '/../../src/templates/templateDetails.xml';
+        
+        if (!file_exists($manifestPath)) {
+            $this->markTestSkipped('Manifest file not found');
+        }
+
+        $xml = @simplexml_load_file($manifestPath);
+        
+        $this->assertNotFalse(
+            $xml,
+            'Template manifest should be valid XML'
+        );
+    }
+
+    /**
+     * Test that template has required fields in manifest
+     */
+    public function testManifestHasRequiredFields()
+    {
+        $manifestPath = __DIR__ . '/../../src/templates/templateDetails.xml';
+        
+        if (!file_exists($manifestPath)) {
+            $this->markTestSkipped('Manifest file not found');
+        }
+
+        $xml = simplexml_load_file($manifestPath);
+        
+        // Check for required elements
+        $this->assertNotEmpty((string)$xml->name, 'Template should have a name');
+        $this->assertNotEmpty((string)$xml->version, 'Template should have a version');
+        $this->assertNotEmpty((string)$xml->author, 'Template should have an author');
+    }
+}