docs(cursor): Add standalone setup guide for Cursor users without Claude Code

- Create STANDALONE-SETUP.md with complete setup instructions for Gemini/OpenRouter
- Add "Quick Start for Cursor Users" section to README.md with standalone link
- Add provider configuration section to QUICKSTART.md with API key setup
- Fix worker restart command in README.md troubleshooting section

This enables Cursor users without Claude Code subscription to use claude-mem
with free-tier AI providers (Gemini 1500 req/day, OpenRouter free models).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cursor-hooks/README.md

@@ -2,6 +2,14 @@
 
 This directory contains Cursor hooks that connect claude-mem to Cursor, enabling persistent memory across Cursor sessions.
 
+## Quick Start for Cursor Users
+
+**Using Claude Code?** Skip to [Installation](#installation) - everything works automatically.
+
+**Cursor-only (no Claude Code)?** See [STANDALONE-SETUP.md](STANDALONE-SETUP.md) for free-tier options using Gemini or OpenRouter.
+
+---
+
 ## Overview
 
 The hooks bridge Cursor's hook system to claude-mem's worker API, allowing:
@@ -172,8 +180,7 @@ Install on Ubuntu: `apt-get install jq curl`
 
 3. Restart worker:
    ```bash
-   cd ~/.claude/plugins/marketplaces/thedotmack
-   npm run worker:restart
+   claude-mem restart
    ```
 
 ### Observations not being saved