Add Asset Management app

Assets from purchase invoice lines, straight-line depreciation/amortization with salvage value, disposals, and [Asset Mgmt] sources in Batch GL Entries. Green third workspace with an app access guard.

app/include_setting_sidebar.php

@@ -93,8 +93,9 @@
       <small class="nav-text text-muted">Navigation</small>
     </li>
 
+    <?php require_once __DIR__ . '/assets/utils/app_registry.php'; ?>
     <li>
-      <a class="nav-link" href="<?php echo $server_url?>dashboard/index.php">
+      <a class="nav-link" href="<?php echo $server_url . app_home_path($app_registry, $_SESSION['login_current_app'] ?? 'wms'); ?>">
         <i class="ti ti-arrow-left"></i>
         <span class="nav-text">Back to App</span>
       </a>