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

i18n/de/docusaurus-plugin-content-docs/current/wiki-import/ModDevs/Guides/Getting-Started.md

@@ -0,0 +1,13 @@
+# Getting Started EN
+
+## Steps
+
+1. Build FrikaMF locally (`dotnet build`).
+2. Create your mod project.
+3. Validate runtime dependency on `FrikaModdingFramework`.
+4. Use hooks/events from the reference pages.
+
+## Next
+
+- [Hook Event Reference EN](../Reference/Hook-Event-Reference)
+- [Troubleshooting EN](../Troubleshooting/overview)