Restructure README to promote hosted MCP server

- Prioritize remote server at https://mcp.codealive.ai/api/ as primary option
- Add setup instructions for all major AI clients (Claude Code, Cursor, Continue, VS Code, Cline)
- Move Available Tools and Usage Examples higher for better engagement
- Simplify structure: Remote → Docker → Local Development
- Use "Remote" terminology instead of "Hosted" for clarity

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

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

Author: IvanBiruk