feat: full de-Angularization with Bootstrap 5 migration

- Removed AngularJS 1.4.8 completely — no more framework dependency
- Extracted core RCON logic into pure vanilla JS (js/rcon.js)
- Added lightweight hash-based SPA router (js/router.js)
- Rewrote all 6 pages as vanilla JS modules in js/pages/
- Migrated Bootstrap 3 → Bootstrap 5 (cards instead of panels, bootstrap-icons instead of glyphicons)
- Removed jQuery dependency (Bootstrap 5 is vanilla JS)
- Purged all Angular templates from html/
- Removed npm artifacts (package.json, node_modules)
- Added nginx.example.conf for static hosting
- Updated rcon.css dark theme for BS5 variables
- Static file only — no Node.js backend required

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

js/router.js

@@ -0,0 +1,80 @@
+/**
+ * Minimal hash-based SPA router.
+ *
+ * Route format:  { pattern: RegExp, title: string, template: string, onEnter: function(params, container) }
+ *
+ * The first matching route's onEnter is called with parsed params and a container element.
+ * The container is cleared before each navigation.
+ *
+ * Usage:
+ *   Router.add(/^\/(.+)\/info$/,          'Server',      'html/serverInfo.html',  ServerInfoPage);
+ *   Router.add(/^\/(.+)\/player\/(.+)$/,  'Player Info', 'html/playerInfo.html', PlayerInfoPage);
+ *   Router.start('#app-view');
+ */
+var Router = (function () {
+  'use strict';
+
+  var routes = [];
+  var viewSelector = null;
+  var currentCleanup = null;
+
+  function add(pattern, title, template, onEnter) {
+    routes.push({ pattern: pattern, title: title, template: template, onEnter: onEnter });
+  }
+
+  function navigate(hash) {
+    // strip leading # and optional /
+    var path = (hash || '').replace(/^#\/?/, '/');
+    if (!path || path === '/') path = '/home';
+
+    for (var i = 0; i < routes.length; i++) {
+      var r = routes[i];
+      var match = path.match(r.pattern);
+      if (match) {
+        // Store params for later use
+        var container = document.querySelector(viewSelector);
+        if (!container) return;
+
+        // Cleanup previous page
+        if (currentCleanup && typeof currentCleanup === 'function') {
+          currentCleanup();
+          currentCleanup = null;
+        }
+
+        // Clear container
+        container.innerHTML = '';
+
+        // Call onEnter with match groups + container
+        if (typeof r.onEnter === 'function') {
+          var result = r.onEnter(match, container);
+          if (typeof result === 'function') {
+            currentCleanup = result;
+          }
+        }
+        return;
+      }
+    }
+  }
+
+  function start(selector) {
+    viewSelector = selector;
+    window.addEventListener('hashchange', function () {
+      navigate(window.location.hash);
+    });
+    // Initial navigation
+    if (window.location.hash) {
+      navigate(window.location.hash);
+    }
+  }
+
+  function go(hash) {
+    window.location.hash = hash;
+  }
+
+  return {
+    add: add,
+    start: start,
+    go: go,
+    navigate: navigate
+  };
+})();