Merge Docusaurus site: all content under docs/, align with gregFramework split layout

- Move markdown and wiki-import tree into docs/; keep app shell at repo root
- Point docusaurus docs path to docs/; edit links to mleem97/gregWiki
- Sync and i18n scripts use gregWiki root and ../.wiki under gregFramework
- Sidebars: workspace layout from root docs ids; plugins under mods/extensions
- Fix redirects, module catalog URLs, release note paths, and wiki-import category keys
- Update repo inventory for split repos; Dockerfile for single-repo context

Made-with: Cursor

static/js/auto-locale.js

@@ -0,0 +1,3 @@
+(function () {
+  // Locale redirects intentionally disabled.
+})();

static/js/canonical-host.js

@@ -0,0 +1,63 @@
+(function () {
+  try {
+    var allowedDomainRoots = [
+      'gregframework.eu',
+      'gregframework',
+      'datacentermods.com',
+      'datacentermods',
+      'frikadellental.de',
+    ];
+
+    var currentHost = window.location.hostname.toLowerCase();
+    var currentOrigin = window.location.origin;
+    var path = window.location.pathname + window.location.search;
+
+    function isAllowedHost(host, root) {
+      return host === root || host.endsWith('.' + root);
+    }
+
+    var hostAllowed = allowedDomainRoots.some(function (root) {
+      return isAllowedHost(currentHost, root);
+    });
+
+    var fallbackOrigin = 'https://frikadellental.de';
+    var canonicalNode = document.querySelector('link[rel="canonical"]');
+    if (canonicalNode) {
+      try {
+        fallbackOrigin = new URL(canonicalNode.getAttribute('href')).origin;
+      } catch (error) {
+        // keep default fallback
+      }
+    }
+
+    var chosenOrigin = hostAllowed ? currentOrigin : fallbackOrigin;
+    var currentUrl = chosenOrigin + path;
+
+    if (canonicalNode) {
+      canonicalNode.setAttribute('href', currentUrl);
+    }
+
+    var ogUrl = document.querySelector('meta[property="og:url"]');
+    if (ogUrl) {
+      ogUrl.setAttribute('content', currentUrl);
+    }
+
+    var alternates = document.querySelectorAll('link[rel="alternate"]');
+    alternates.forEach(function (node) {
+      var href = node.getAttribute('href');
+      if (!href) {
+        return;
+      }
+
+      try {
+        var parsed = new URL(href);
+        var normalized = chosenOrigin + parsed.pathname + parsed.search;
+        node.setAttribute('href', normalized);
+      } catch (error) {
+        // ignore malformed URLs
+      }
+    });
+  } catch (error) {
+    // no-op
+  }
+})();