docs: update for consolidated Joomla template repo

- Update WORKFLOW_STANDARDS.md to reference MokoStandards-Template-Joomla
- Remove 6 obsolete sync definitions for deleted individual template repos
- Update sync commands to use unified template

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

templates/scripts/validate/validate_structure.php

@@ -32,7 +32,7 @@ use MokoEnterprise\CliFramework;
  *   - Required root files present (README.md, CHANGELOG.md, LICENSE, CONTRIBUTING.md,
  *     SECURITY.md, .gitignore, .editorconfig, composer.json)
  *   - Required directories present (src/, docs/, tests/)
- *   - .mokostandards.yml governance attachment present
+ *   - .gitea/.mokostandards XML governance manifest present
  *   - SPDX-License-Identifier header present in all PHP source files
  *   - No tab characters in YAML/JSON config files
  *   - No Windows path separators in PHP source
@@ -74,10 +74,25 @@ class ValidateStructure extends CliFramework
 
 		// ── Governance attachment ─────────────────────────────────────────
 		$this->section('MokoStandards governance');
-		$mokoFile = file_exists("{$path}/.mokostandards.yml");
-		$this->status($mokoFile, '.mokostandards.yml');
+		$mokoFile = file_exists("{$path}/.gitea/.mokostandards")
+			|| file_exists("{$path}/.github/.mokostandards")
+			|| file_exists("{$path}/.mokostandards");
+		$this->status($mokoFile, '.gitea/.mokostandards (XML manifest)');
 		$mokoFile ? $passed++ : $failed++;
 
+		// Validate XML format if file exists
+		if ($mokoFile) {
+			$manifestPath = file_exists("{$path}/.gitea/.mokostandards")
+				? "{$path}/.gitea/.mokostandards"
+				: (file_exists("{$path}/.github/.mokostandards")
+					? "{$path}/.github/.mokostandards"
+					: "{$path}/.mokostandards");
+			$manifestContent = file_get_contents($manifestPath);
+			$isXml = str_contains($manifestContent, '<mokostandards');
+			$this->status($isXml, '.mokostandards uses XML format');
+			$isXml ? $passed++ : $failed++;
+		}
+
 		// ── Required directories ──────────────────────────────────────────
 		$this->section('Required directories');
 		foreach (['src', 'docs', 'tests'] as $dir) {