Enhance README with deployment guides and acknowledgments

[Copilot]

Optimizes documentation structure and adds production deployment guidance for both Node.js and Go implementations.

Changes

• Added table of contents for navigation across expanded sections
• Clarified dual implementation architecture - separated Node.js (lightweight) vs Go (performance) quick start instructions
• Added deployment tutorials covering:
  • Docker & Docker Compose configurations for both implementations
  • Process management (PM2, Systemd)
  • Reverse proxy setup (Nginx with SSL/streaming support)
  • Cloud platform deployment (Railway, Heroku)
• Added troubleshooting guide for token refresh, port conflicts, timeouts, and memory issues
• Added acknowledgments to antigravity2api-nodejs and Antigravity-

Example Deployment

FROM node:18-alpine
WORKDIR /app
COPY js/package*.json ./
RUN npm install --production
COPY js/ .
EXPOSE 8045
CMD ["npm", "start"]

docker run -d \
  -p 8045:8045 \
  -v $(pwd)/js/config.json:/app/config.json \
  -v $(pwd)/js/data:/app/data \
  antigravity-proxy:latest

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add new features</issue_title>
<issue_description>Optimized the readme file, added acknowledgments to https://github.com/liuw1535/antigravity2api-nodejs and https://github.com/lwl2005/Antigravity- Optimized documentation and added deployment tutorials. </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add new features #1

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