… util.MIMEType parity

…le parity

…runtime

…able

…pectations

… from legacy adapter paths

…mantics

…lifetime

…n the JS kernel

…rnel]

…ementation intent

…r tokens

…re __filename

…er tokens

…dependency chain

…kens

…r tokens

…ry commands

…provider tokens

All quickstart examples now use ESM syntax (import/export) instead of
CJS (require/module.exports) and the NodeRuntime API instead of the
kernel API. Adds a new multi-file ESM example showing VFS imports.

fetch.ts needed useDefaultNetwork to route traffic to host and
filePath: "/entry.mjs" for top-level await. typescript.ts needed
moduleAccess to find the typescript package.

Convert sandbox code in permissions, module-loading, filesystem,
virtual-filesystem, child-processes, plugin-systems, ai-agent-code-exec,
dev-servers, and node runtime docs from require/module.exports to
import/export with .mjs filePath.