docs: refine documentation structure and language consistency

- Updated the tagline in `docusaurus.config.js` for improved clarity.
- Streamlined sidebar navigation items for better organization of player and developer resources.
- Enhanced README and various documentation files to clarify repository layout and improve accessibility.
- Standardized language to English across documentation, ensuring consistency and clarity.
- Removed unnecessary German localization references to focus on English content.

This commit aims to enhance the overall clarity and usability of the documentation.

docs/README.md

@@ -4,17 +4,17 @@ This folder is the **single source of truth** for the public Docusaurus site. Th
 
 ## How content is organized
 
-| Area | Path | Purpose |
-|------|------|--------|
-| **Landing** | [`intro` → `/wiki/docs`](/wiki/docs) | Site home (`/wiki/docs`). |
-| **Topics hub** | [`topics/`](./topics/index.md) | Cross-cutting overviews (security, FFI, multiplayer, assets, meta). |
-| **Mods & plugins** | [`mods/`](./mods/), [`plugins/`](./plugins/) | Gameplay mods (`FMF.*`) and framework plugins (`FFM.Plugin.*`). |
-| **Releases** | [`releases/`](./releases/) | Per-artifact release notes. |
-| **Reference** | [`reference/`](./reference/) | Hooks, naming, MCP, generated catalogs. |
-| **Contributors** | [`contributors/`](./contributors/) | Repo layout, Docusaurus workflow, design system. |
-| **Guides** | [`guides/`](./guides/players/overview.md) | Role-based paths (players, mod developers, contributors, sponsors). |
-| **Roadmap** | [`roadmap/`](./roadmap/) | Planning docs. |
-| **Meta** | [`meta/`](./meta/) | Workshop, devserver, backlog; [architecture principles](./meta/system-architecture-principles.md) (ModManager → Framework → Plugins → Mods). |
+| Area               | Path                                         | Purpose                                                                                                                                      |
+| ------------------ | -------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------- |
+| **Landing**        | [`intro` → `/wiki/docs`](/wiki/docs)         | Site home (`/wiki/docs`).                                                                                                                    |
+| **Topics hub**     | [`topics/`](./topics/index.md)               | Cross-cutting overviews (security, FFI, multiplayer, assets, meta).                                                                          |
+| **Mods & plugins** | [`mods/`](./mods/), [`plugins/`](./plugins/) | Gameplay mods (`FMF.*`) and framework plugins (`FFM.Plugin.*`).                                                                              |
+| **Releases**       | [`releases/`](./releases/)                   | Per-artifact release notes.                                                                                                                  |
+| **Reference**      | [`reference/`](./reference/)                 | Hooks, naming, MCP, generated catalogs.                                                                                                      |
+| **Contributors**   | [`contributors/`](./contributors/)           | Repo layout, Docusaurus workflow, design system.                                                                                             |
+| **Guides**         | [`guides/`](./guides/players/overview.md)    | Role-based paths (players, mod developers, contributors, sponsors).                                                                          |
+| **Roadmap**        | [`roadmap/`](./roadmap/)                     | Planning docs.                                                                                                                               |
+| **Meta**           | [`meta/`](./meta/)                           | Workshop, devserver, backlog; [architecture principles](./meta/system-architecture-principles.md) (ModManager → Framework → Plugins → Mods). |
 
 ## URLs
 
@@ -23,14 +23,14 @@ This folder is the **single source of truth** for the public Docusaurus site. Th
 
 ## Scripts (repository root)
 
-| Script | Role |
-|--------|------|
-| `wiki:sync` | **No-op** (legacy GitHub Wiki mirror removed). |
-| `wiki:normalize-i18n` | **No-op** (same). |
-| `wiki:refresh` | Runs both no-ops; safe for old CI hooks. |
+| Script                | Role                                           |
+| --------------------- | ---------------------------------------------- |
+| `wiki:sync`           | **No-op** (legacy GitHub Wiki mirror removed). |
+| `wiki:normalize-i18n` | **No-op** (same).                              |
+| `wiki:refresh`        | Runs both no-ops; safe for old CI hooks.       |
 
 Author new pages under `docs/`; use **git history** if you need text from the former bulk import.
 
-## Locales
+## Language
 
-- **Language:** English only — files under `docs/`.
+- **English only** — all files under `docs/`.