docs: translate README into Indonesian — Bahasa Indonesia (README.id.md)

[alphacrack]

User story

As a Indonesian-speaking developer, I want readme2demo's README in Bahasa Indonesia, so that I can evaluate and adopt the tool without an English-proficiency tax.

What

Translate the current README.md (main branch) into Indonesian, as a new root-level file README.id.md.

Rules (non-negotiable)

1. Commands, terminal outputs, YAML, and code blocks stay VERBATIM in English — prose explains, code executes. A translated command breaks copy-paste; this is the repo's grounding invariant applied to translations.
2. Every URL stays absolute and unchanged — the README is fully absolute since release: make the repo PyPI-publishable — absolute README links + active pypi job #176 so your copy inherits working links and images everywhere.
3. First line of the file is a drift stamp so staleness is detectable later:
   <!-- translated-from: <short sha of README.md's latest commit at translation time> -->
4. Add one link to your translation in the language switcher row near the top of the English README.md (create the row as 🌍 Bahasa Indonesia if you're first), and link back to the English README at the top of your file.
5. Keep these terms in English on first use, glossed in Bahasa Indonesia as your tech community prefers: sandbox, grounding, clean-room, verified, pipeline, badge.

Quality bar

AI-assisted translation is welcome, but the PR author must be a Indonesian speaker and review every line — you are the human in the loop, and your name goes in the contributors list for it.

Acceptance criteria

• README.id.md at repo root, full translation of the current README
• Zero modified commands/code blocks (diff of fenced blocks vs source = empty)
• All URLs identical to the source README
• Drift-stamp comment on line 1; switcher link added in README.md

Notes for contributors

Pure documentation — no Python, no Docker, no API key needed. Edit, preview, PR. Questions about a phrasing? Ask right here in the issue.