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/varaverk.plg

@@ -10,6 +10,7 @@
 <!ENTITY plugdir "/usr/local/emhttp/plugins/varaverk">
 ]>
 <PLUGIN name="&name;" author="&author;" version="&version;" launch="&launch;"
+        support="https://github.com/FailedProxy/Varaverk/issues"
         icon="/plugins/varaverk/icons/varaverk.png">
 
 <CHANGES>
@@ -114,7 +115,8 @@ if [[ ! -f "$CONF_DIR/master.conf" ]]; then
     fi
 fi
 
-log "Install complete"
+log "Install complete — open Varaverk in Unraid to complete setup"
+log "→ Plugins → Varaverk  (or navigate to Settings → Utilities → Varaverk)"
 ]]>
 </INLINE>
 </FILE>