feat: add MCP server example for sandboxed JavaScript execution

Add an MCP (Model Context Protocol) server that exposes an
execute_javascript tool, allowing AI agents to run arbitrary JavaScript
inside an isolated Hyperlight micro-VM sandbox with strict CPU time
limits and automatic snapshot/restore recovery after timeouts.

Includes server implementation, demo scripts (PowerShell and Bash),
vitest test suite, and documentation.

Signed-off-by: Simon Davies <simongdavies@users.noreply.github.com>

Author: simongdavies

src/js-host-api/eslint.config.mjs

@@ -20,6 +20,7 @@ export default [
                 clearTimeout: 'readonly',
                 setInterval: 'readonly',
                 clearInterval: 'readonly',
+                performance: 'readonly',
             },
         },
         rules: {