docs: replace LibreChat Python installer with MCP Action plugin

Author: aabrur

.librechat/INSTALL.md

@@ -1,7 +1,24 @@
-# Hypertaks LibreChat Installation
+# Hypertaks Plugin for LibreChat
 
-Run:
-```bash
-python scripts/installer.py install librechat
-```
-This adds the Hypertaks tool preset to LibreChat `librechat.yaml`.
+LibreChat supports third-party tools through MCP servers and OpenAPI Actions.
+
+## Install
+
+Register the tracked Hypertaks plugin adapter as either:
+
+- an MCP server entry pointing to the deployed Hypertaks endpoint; or
+- an OpenAPI Action using the reviewed Hypertaks schema.
+
+Restart or reload the LibreChat deployment after changing plugin configuration.
+
+## Update
+
+Update the Hypertaks endpoint or Action schema and reload LibreChat.
+
+## Uninstall
+
+Remove only the Hypertaks MCP or Action entry.
+
+## Compatibility
+
+Official native plugin-compatible integration: `PASS`.