Add GitHub link, fix Settings page, direct users to setup on install

Plugin/varaverk.plg:
  - Add support="https://github.com/FailedProxy/Varaverk/issues"
  - Install completion log now says "open Varaverk to complete setup"
    with navigation hint — user lands on wizard automatically

Plugin/unraid/VaraverkSettings.page:
  - Fix stale SCRIPTS_DIR default (unraid_scripts → Varaverk)
  - Add GitHub / Issues / Changelog links at bottom of settings page

Plugin/unraid/Varaverk.page:
  - Small "⎋ GitHub" link right-aligned in the tab bar
    links to github.com/FailedProxy/Varaverk in a new tab

Plugin/unraid/Varaverk.page

@@ -40,6 +40,12 @@ $tabLabels = ['monitor' => 'Monitor', 'scheduler' => 'Scheduler', 'docker' => 'D
         <?= $tabLabels[$t] ?? ucfirst($t) ?>
       </a>
     <?php endforeach; ?>
+    <a href="https://github.com/FailedProxy/Varaverk" target="_blank"
+       style="margin-left:auto;padding:0 10px;font-size:10px;color:#333;text-decoration:none;
+              display:flex;align-items:center;letter-spacing:.03em;"
+       title="GitHub — source, issues, changelog">
+      ⎋ GitHub
+    </a>
   </div>
 
   <!-- Tab content -->

Plugin/unraid/VaraverkSettings.page

@@ -0,0 +1,38 @@
+Menu="OtherSettings"
+Title="Varaverk"
+Icon="varaverk.png"
+---
+<?php
+$cfg         = parse_plugin_cfg('varaverk');
+$scripts_dir = $cfg['SCRIPTS_DIR'] ?? '/mnt/user/appdata/Varaverk';
+?>
+
+<form markdown="1" name="varaverk_settings" method="POST" action="/update.php" target="progressFrame">
+<input type="hidden" name="#file" value="varaverk/varaverk.cfg">
+
+_(Scripts directory)_:
+: <input type="text" name="SCRIPTS_DIR" maxlength="255" value="<?=htmlspecialchars($scripts_dir)?>">
+
+> Path where Varaverk is installed. Changing this only affects the plugin UI — update any scripts that reference the old path manually.
+
+&nbsp;
+: <input type="submit" value="_(Apply)_">
+
+</form>
+
+<div style="margin-top:24px;padding-top:16px;border-top:1px solid #2a2a2a;font-family:monospace;font-size:11px;color:#444;">
+  <a href="https://github.com/FailedProxy/Varaverk" target="_blank"
+     style="color:#555;text-decoration:none;">
+    ⎋ github.com/FailedProxy/Varaverk
+  </a>
+  &nbsp;·&nbsp;
+  <a href="https://github.com/FailedProxy/Varaverk/issues" target="_blank"
+     style="color:#555;text-decoration:none;">
+    Issues
+  </a>
+  &nbsp;·&nbsp;
+  <a href="https://github.com/FailedProxy/Varaverk/blob/main/CHANGELOG.md" target="_blank"
+     style="color:#555;text-decoration:none;">
+    Changelog
+  </a>
+</div>