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

scripts/fix-wiki-import-en-links.mjs

@@ -0,0 +1,36 @@
+/**
+ * One-off helper: strip legacy -en suffixes from markdown links after i18n normalize.
+ * Run from gregWiki root: node scripts/fix-wiki-import-en-links.mjs
+ */
+import fs from 'node:fs';
+import path from 'node:path';
+
+function walk(dir) {
+  for (const ent of fs.readdirSync(dir, { withFileTypes: true })) {
+    const p = path.join(dir, ent.name);
+    if (ent.isDirectory()) walk(p);
+    else if (ent.name.endsWith('.md')) {
+      let s = fs.readFileSync(p, 'utf8');
+      const orig = s;
+      s = s.replace(/Troubleshooting\/Troubleshooting-en/g, 'Troubleshooting/overview');
+      s = s.replace(/\.\.\/Troubleshooting\/Troubleshooting-en/g, '../Troubleshooting/overview');
+      s = s.replace(/\(Troubleshooting-en\)/g, '(overview)');
+      s = s.replace(/([a-zA-Z0-9/_.-])-en\)/g, '$1)');
+      if (s !== orig) {
+        fs.writeFileSync(p, s);
+        console.log('updated', p);
+      }
+    }
+  }
+}
+
+const roots = [
+  path.resolve(import.meta.dirname, '../docs/wiki-import'),
+  path.resolve(
+    import.meta.dirname,
+    '../i18n/de/docusaurus-plugin-content-docs/current/wiki-import',
+  ),
+];
+for (const r of roots) {
+  if (fs.existsSync(r)) walk(r);
+}