refactor: update project branding and structure for gregFramework

- Changed project title and tagline in docusaurus.config.js to reflect the new branding.
- Updated package.json and package-lock.json to rename the project to gregwiki-docs-site.
- Adjusted sidebar and documentation files to align with the new project structure and naming conventions.
- Enhanced documentation content for clarity and consistency across various sections.
- Added Prettier as a development dependency for code formatting.

This commit aligns the project with the new branding and improves overall documentation quality.

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

@@ -25,10 +25,10 @@ function walk(dir) {
 }
 
 const roots = [
-  path.resolve(import.meta.dirname, '../docs/wiki-import'),
+  path.resolve(import.meta.dirname, '../docs/legacy/wiki-import'),
   path.resolve(
     import.meta.dirname,
-    '../i18n/de/docusaurus-plugin-content-docs/current/wiki-import',
+    '../i18n/de/docusaurus-plugin-content-docs/current/legacy/wiki-import',
   ),
 ];
 for (const r of roots) {