docs: update docusaurus configuration and documentation structure

- Revised the tagline in `docusaurus.config.js` for improved clarity on the documentation's focus.
- Removed German localization support from the configuration to streamline the user experience.
- Updated navigation items in the sidebar to better reflect the current structure, emphasizing player and developer resources.
- Enhanced the README and various documentation files to clarify the repository layout and improve accessibility for users.
- Adjusted links and descriptions throughout the documentation to ensure consistency and accuracy.

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

docs/plugins/ffm-plugin-asset-exporter.md

@@ -12,4 +12,4 @@ Provides export-focused tooling for asset-related workflows.
 ## Sources
 
 - Module path: `gregExt.AssetExporter/`
-- Overview: [`Standalone Mods`](/wiki/legacy/wiki-import/StandaloneMods)
+- See also: [Mods overview](/wiki/mods/)

docs/plugins/ffm-plugin-multiplayer.md

@@ -12,4 +12,4 @@ Contains **multiplayer / networking** runtime (bridge, sync). **Not** the same a
 ## Sources
 
 - Module path: `gregExt.Multiplayer/`
-- Roadmap context: [`Steamworks P2P Multiplayer Roadmap`](/wiki/legacy/wiki-import/Steamworks-P2P-Multiplayer-Roadmap)
+- Roadmap: [Unified roadmap](/wiki/roadmap/unified-roadmap) · [Multiplayer topic](/wiki/topics/multiplayer-and-networking/overview)

docs/plugins/ffm-plugin-player-models.md

@@ -12,4 +12,4 @@ Hosts standalone player-model specific behavior and integration.
 ## Sources
 
 - Module path: `gregExt.PlayerModels/`
-- Debug docs: [`Mod Developer Debug`](/wiki/legacy/wiki-import/Mod-Developer-Debug)
+- Debug: [Mod developers (hub)](/wiki/guides/mod-developers/overview)

docs/plugins/ffm-plugin-sysadmin.md

@@ -12,4 +12,4 @@ Contains **sysadmin-oriented UI** features (Unity UI modernization, mod settings
 ## Sources
 
 - Module path: `gregExt.Sysadmin/`
-- Framework context: [`Framework Features & Use Cases`](/wiki/legacy/wiki-import/Framework-Features-Use-Cases)
+- Framework context: [Framework](/wiki/mods/framework)

docs/plugins/ffm-plugin-web-ui-bridge.md

@@ -12,4 +12,4 @@ Focuses on standalone web UI bridge integration flows.
 ## Sources
 
 - Module path: `gregExt.WebUIBridge/`
-- Reference: [`Web UI Bridge (DC2WEB)`](/wiki/legacy/wiki-import/Web-UI-Bridge)
+- Related: [Multiplayer & networking hub](/wiki/topics/multiplayer-and-networking/overview)

docs/plugins/index.md

@@ -6,7 +6,7 @@ description: FFM.Plugin.* modules that extend the framework runtime — distinct
 
 # Framework plugins (`FFM.Plugin.*`)
 
-These **plugins** ship as `FFM.Plugin.*` assemblies and extend the **framework runtime**. **Source of truth** on disk: one split-repo folder per plugin under the workspace root, named **`gregExt.<Name>/`** (for example `gregExt.AssetExporter/`). Mirrored copies may also exist under `gregCore/plugins/` for solution builds. Deploy built DLLs under the game’s FMF plugin path (see [Game folder layout](/wiki/topics/meta/game-folder-layout)).
+These **plugins** ship as `FFM.Plugin.*` assemblies and extend the **framework runtime** (layer **3** in **ModManager → Framework → Plugins → Mods** — [architecture principles](/wiki/meta/system-architecture-principles)). **Source of truth** on disk: one split-repo folder per plugin under the workspace root, named **`gregExt.<Name>/`** (for example `gregExt.AssetExporter/`). Mirrored copies may also exist under `gregCore/plugins/` for solution builds. Deploy built DLLs under the game’s FMF plugin path (see [Game folder layout](/wiki/topics/meta/game-folder-layout)).
 
 Gameplay mods (`FMF.*`) are documented under **[Mods](../mods/index.md)** — not here.