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/mods/fmf-hex-label-mod.md

@@ -101,4 +101,4 @@ Output lands in the standard MelonLoader `Mods/` folder as configured in the `.c
 ## Sources
 
 - Module path: `gregMod.HexLabelMod/`
-- Relatedocs: [`Standalone Mods`](/wiki/legacy/wiki-import/StandaloneMods)
+- See also: [Mods overview](/wiki/mods/)

docs/mods/framework.md

@@ -5,6 +5,8 @@ sidebar_label: Framework
 
 **Language:** mod, plugin, and extension **logic must be written in C#** — see [Modding language (C# only)](/wiki/reference/modding-language-requirement).
 
+**Stack position:** gameplay **mods** sit on top of **plugins** and the **framework SDK**; the **ModManager** (MAUI) is the out-of-game front-end — see [System architecture & documentation principles](/wiki/meta/system-architecture-principles).
+
 The core `FrikaMF` runtime provides:
 
 - Harmony patch integration for gameplay hooks

docs/mods/index.md

@@ -6,7 +6,7 @@ description: Standalone MelonLoader gameplay mods (FMF.*) — separate from FFM
 
 # Gameplay mods
 
-These pages document **gameplay mods** (`FMF.*` assemblies). **Source of truth** on disk: split-repo folders **`gregMod.<Name>/`** directly under the gregFramework workspace root (not under a legacy `gregMods/` umbrella). They are **not** the same as [FFM plugins](../plugins/index.md), which extend the framework inside the game process.
+These pages document **gameplay mods** (`FMF.*` assemblies) — **layer 4** in **ModManager → Framework → Plugins → Mods** ([architecture principles](/wiki/meta/system-architecture-principles)). **Source of truth** on disk: split-repo folders **`gregMod.<Name>/`** directly under the gregFramework workspace root (not under a legacy `gregMods/` umbrella). They are **not** the same as [FFM plugins](../plugins/index.md), which extend the framework inside the game process.
 
 ## Mods