Update README

CRITICAL: Root-Only Scope

This skill operates ONLY on the root-level README.md and README.zh-CN.md of the project. It NEVER touches README files in subdirectories, packages, modules, or any nested path.

Root-level means the directory that contains the project's main manifest (package.json, pyproject.toml, go.mod, Cargo.toml, etc.) or the git repository root.

If the user asks about a README in a subdirectory, do NOT apply this skill. Handle it as a plain file edit without the update-readme workflow.

Keep README.md (English, primary) and README.zh-CN.md (Simplified Chinese, secondary) in sync with the project's actual current state. Both files must be accurate, complete, and consistent with each other.

CRITICAL: Ground Truth and Header Format

• Write from ground truth, not from memory or assumption. Every skill/component listed in the README MUST exist in the repository at the time of writing. Verify existence before writing.
• Every README MUST open with the exact header structure shown in the "Header Format" section below, including the language toggle. Adapt badges, project name, and description to the project; do not omit the structure.
• Do not output README content as a code block in the conversation. Use the Edit or Write tool to write the files directly.

Header Format (Required)