feat(api): add Joomla Web Services API for OG tags (closes #27)

New sub-extension: plg_webservices_mokoog
- Registers REST API routes via onBeforeApiRoute
- CRUD endpoints at /api/index.php/v1/mokoog/tags
- Lookup endpoint at /api/index.php/v1/mokoog/lookup/:type/:id
- SubscriberInterface pattern with DI container

Component API layer (com_mokoog/api/):
- TagsController extending ApiController for CRUD operations
- JsonapiView with whitelisted fields for JSON:API output
- TagModel (AdminModel) for single-item operations

Package updates:
- pkg_mokoog.xml includes plg_webservices_mokoog
- Install script auto-enables webservices plugin
- Component manifest declares api/ directory

Authored-by: Moko Consulting

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

src/script.php

@@ -73,6 +73,17 @@ class Pkg_MokoOGInstallerScript
 
             $db->setQuery($query);
             $db->execute();
+
+            // Enable the webservices plugin automatically
+            $query = $db->getQuery(true)
+                ->update($db->quoteName('#__extensions'))
+                ->set($db->quoteName('enabled') . ' = 1')
+                ->where($db->quoteName('type') . ' = ' . $db->quote('plugin'))
+                ->where($db->quoteName('folder') . ' = ' . $db->quote('webservices'))
+                ->where($db->quoteName('element') . ' = ' . $db->quote('mokoog'));
+
+            $db->setQuery($query);
+            $db->execute();
         }
     }
 }