Add first-run wizard, host.conf template, fix GitHub URL

Plugin/varaverk.plg: URL updated to github.com/FailedProxy/Varaverk

Configurations/host.conf.template:
  Full host conf structure with HOSTN/hostn placeholders.
  All personal values blank, all sections documented.
  Covers identity, rsync, docker, fallback, media, monitors,
  transcodes, arrs, system watchdog, resource manager.

Varaverk.page: checks if HOST1 is blank before rendering tabs.
  If blank → shows setup wizard, returns early (tabs never render).

pages/setup.php: first-run wizard UI.
  Auto-populates hostname from hostname -s.
  Role selection: primary (HOST1) or partner (HOST2+).
  Partner slot selector for HOST3+.

api/setup.php: handles wizard form POST.
  Writes HOST1/HOST2 (and HOST3+) into master.conf preserving all
  other content. Creates host*.conf from template with HOSTN/hostn
  replaced and SSH key path pre-filled from hostname convention.
  Never overwrites an existing host*.conf.

Plugin/varaverk.plg

@@ -4,7 +4,7 @@
 <!ENTITY author  "gmer4lfe">
 <!ENTITY version "2026.05.28">
 <!ENTITY launch  "varaverk/monitor">
-<!ENTITY github  "https://github.com/gmer4lfe/Varaverk">
+<!ENTITY github  "https://github.com/FailedProxy/Varaverk">
 <!ENTITY branch  "main">
 <!ENTITY cfgdir  "/boot/config/plugins/varaverk">
 <!ENTITY plugdir "/usr/local/emhttp/plugins/varaverk">
@@ -29,7 +29,7 @@
 <![CDATA[
 #!/bin/bash
 PLUGIN="varaverk"
-GITHUB="https://github.com/gmer4lfe/Varaverk"
+GITHUB="https://github.com/FailedProxy/Varaverk"
 BRANCH="main"
 CFG_DIR="/boot/config/plugins/$PLUGIN"
 CFG_FILE="$CFG_DIR/varaverk.cfg"