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/developers.md

@@ -0,0 +1,84 @@
+---
+id: developers
+title: Developers & contributors
+sidebar_label: Developers (hub)
+slug: /developers
+description: Technical documentation for mod authors, plugin authors, and repo contributors — hooks, workspace, releases, and internals.
+---
+
+# Developers & contributors
+
+Use this hub if you **build mods or plugins**, work on **framework** code, or contribute to **repositories and docs**.  
+
+**Players** should start with **[Play & mods](/wiki/guides/players/overview)** (sidebar above) — install, Workshop, troubleshooting.
+
+**Architecture:** read **[System architecture & documentation principles](/wiki/meta/system-architecture-principles)** first — canonical **ModManager → Framework → Plugins → Mods** model, priorities (stability, maintainability, DX), and wiki writing rules.
+
+## Workspace & onboarding
+
+- [Getting started](/wiki/getting-started) — split-repo layout, build core, hook naming
+- [Documentation layout](/wiki/getting-started/documentation-layout) — how `docs/` is organized
+- [Workspace map](/wiki/workspace/) — folders on disk
+
+## Framework
+
+- [Architecture](/wiki/framework/architecture)
+- [FMF hooks](/wiki/framework/fmf-hooks)
+- [Hexmod](/wiki/framework/hexmod)
+
+## Plugins (`FFM.Plugin.*`) & mods (`FMF.*`)
+
+- [Plugins overview](/wiki/plugins/)
+- [Mods overview](/wiki/mods/) — gameplay mods and [Framework](/wiki/mods/framework) article
+
+## Guides (authors & repo)
+
+- [Mod developers](/wiki/guides/mod-developers/overview)
+- [Contributors (workflow)](/wiki/guides/contributors/topics-overview)
+- [Contributor workshop](/wiki/guides/contributors/contributor-workshop)
+- [Release guide](/wiki/guides/contributors/release)
+- [Sponsors](/wiki/guides/sponsors/overview)
+- [By audience (paths)](/wiki/guides/players/audiences-overview) · [Newbies](/wiki/audiences/newbies) · [Intermediates](/wiki/audiences/intermediates) · [Professionals](/wiki/audiences/professionals)
+
+## Tools & meta (advanced)
+
+- [Steam Workshop & tooling](/wiki/meta/Steam-Workshop-and-Tooling)
+- [Devserver betas](/wiki/meta/devserver-betas)
+- [IDEA backlog](/wiki/meta/IDEA_BACKLOG)
+
+## Releases
+
+- [Releases index](/wiki/releases)
+
+## Reference
+
+- [Wiki mapping](/wiki/reference/wiki-mapping)
+- [Mod store vision](/wiki/reference/mod-store-vision)
+- [FMF hook naming](/wiki/reference/fmf-hook-naming)
+- [FMF hooks catalog](/wiki/reference/fmf-hooks-catalog)
+- [MCP server](/wiki/reference/mcp-server)
+- [Release channels](/wiki/reference/release-channels) — also linked under **Play & mods**
+- [Reference data files](/wiki/reference/reference-data-files)
+- [Modding language requirement](/wiki/reference/modding-language-requirement)
+
+## Topics
+
+- [Topics hub](/wiki/topics/)
+
+## Contributors (workflow)
+
+- [Repo inventory](/wiki/contributors/repo-inventory)
+- [Monorepo target layout](/wiki/contributors/monorepo-target-layout)
+- [Design system](/wiki/contributors/luminescent-design-system)
+- [Docusaurus workflow](/wiki/contributors/docusaurus-workflow)
+- [Plugin submission audit](/wiki/contributors/plugin-submission-audit)
+- [Sponsorship automation](/wiki/contributors/sponsorship-automation)
+
+## Roadmap
+
+- [Unified roadmap](/wiki/roadmap/unified-roadmap)
+- [Mod store stages](/wiki/roadmap/mod-store-stages)
+
+## Sponsors
+
+- [SPONSORS](/wiki/SPONSORS)