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

docs/topics/index.md

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+---
+title: Topics hub
+sidebar_label: Topics overview
+description: Thematic index — navigate by audience, reference, roadmap, imports, and meta.
+---
+
+# Topics hub
+
+Documentation is split into **curated wiki pages** (this site), **generated reference** (for example hook catalogs), and **legacy imports** from the GitHub wiki (`.wiki` → `wiki-import/`).
+
+## Quick map
+
+| Area | Start here |
+|------|------------|
+| **Roles (Spieler · Moddevs · Contributor · Sponsoren)** | [By audience](/wiki/topics/audiences/overview) — [End users](/wiki/topics/end-user/overview), [Mod developers](/wiki/topics/mod-developers/overview), [Contributors (workflow)](/wiki/topics/contributors/overview), [Sponsors](/wiki/topics/sponsors/overview) |
+| **Audience paths (experience)** | [Newbies](/wiki/audiences/newbies) · [Intermediates](/wiki/audiences/intermediates) · [Professionals](/wiki/audiences/professionals) |
+| **Technical reference** | [Reference & technical](/wiki/topics/reference/overview) |
+| **Ship planning** | [Roadmap & planning](/wiki/topics/roadmap/overview) |
+| **Repository inventory** | [Repo inventory](/wiki/contributors/repo-inventory) |
+| **Imported legacy wiki** | [Legacy wiki import](/wiki/topics/wiki-import/overview) |
+| **Steam, betas, backlog, game paths** | [Meta & operations](/wiki/topics/meta/overview) — [Game folder layout](/wiki/topics/meta/game-folder-layout) |
+
+## Thematic folders (deep links)
+
+Use these entry points for cross-cutting concerns; each page links into `wiki-import/` and reference docs where relevant.
+
+- [Security & legal](/wiki/topics/security-legal/overview) — licenses, disclaimers, letters to the developer.
+- [FFI, hooks & Lua](/wiki/topics/ffi-and-hooks/overview) — HOOKS, FFI bridge, naming conventions.
+- [Multiplayer & networking](/wiki/topics/multiplayer-and-networking/overview) — Steamworks P2P, Web UI bridge.
+- [Assets & export](/wiki/topics/assets-and-export/overview) — asset export pipeline, templates.
+- [End users](/wiki/topics/end-user/overview) — installs, FAQs, troubleshooting.
+- [Mod developers](/wiki/topics/mod-developers/overview) — getting started, mod config, debugging.
+
+## Releases vs. articles
+
+- **Release pages** (downloads, version banners): [Releases](/wiki/releases/).
+- **Narrative wiki articles** (how it works): [Plugin Wiki](/wiki/mods/extensions) and [Mod Wiki](/wiki/mods/mods).