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/mods/extensions/ffm-plugin-player-models.md

@@ -0,0 +1,15 @@
+---
+title: FFM.Plugin.PlayerModels
+sidebar_label: FFM.Plugin.PlayerModels
+---
+
+`StandaloneMods/FFM.Plugin.PlayerModels`
+
+## Purpose
+
+Hosts standalone player-model specific behavior and integration.
+
+## Sources
+
+- Module path: `StandaloneMods/FFM.Plugin.PlayerModels`
+- Debug docs: [`Mod Developer Debug`](/wiki/wiki-import/Mod-Developer-Debug)