chore: initialize gregWiki standalone repository

mods/extensions/index.md

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+---
+title: Standalone Plugins & Mods
+sidebar_label: Overview
+---
+
+This section contains the first-party standalone modules currently maintained in this repository.
+
+## Classification
+
+- **Plugins** extend the framework runtime capabilities.
+- **Mods** extend the game behavior/content by using framework and plugin capabilities.
+
+## Loading path
+
+- **MelonLoader mods** load from `{GameRoot}/Mods/` (standard MelonLoader behavior).
+- **FMF framework plugins** (`FFM.Plugin.*`) are deployed under `{GameRoot}/FMF/Plugins/`; MelonLoader does not scan that folder by default — see [Game folder layout](/wiki/topics/meta/game-folder-layout).
+- Rust mods via FrikaMF follow the same runtime rules as other MelonLoader mods unless documented otherwise.
+
+## Standalone Plugins
+
+- [FFM.Plugin.AssetExporter](./ffm-plugin-asset-exporter.md)
+- [FFM.Plugin.Multiplayer](./ffm-plugin-multiplayer.md)
+- [FFM.Plugin.PlayerModels](./ffm-plugin-player-models.md)
+- [FFM.Plugin.Sysadmin](./ffm-plugin-sysadmin.md)
+- [FFM.Plugin.WebUIBridge](./ffm-plugin-web-ui-bridge.md)
+
+## Standalone Mods
+
+- [FMF.ConsoleInputGuard](./fmf-console-input-guard.md)
+- [FMF.GregifyEmployees](./fmf-gregify-employees.md)
+- [FMF.HexLabelMod](./fmf-hex-label-mod.md)
+- [FMF.LangCompatBridge](./fmf-lang-compat-bridge.md)
+- [FMF.UIReplacementMod](./fmf-ui-replacement-mod.md)
+
+## Additional context
+
+- [`Standalone Mods` wiki page](/wiki/wiki-import/StandaloneMods)