Add compile commands

[Aaron Chen (chen1plus)]

Closes #107

I used AI, but I've reviewed the output

[Aaron Chen (chen1plus)]

@microsoft-github-policy-service agree

[IAMkecheng]

Thanks for the PR — I tried this locally and it works well (compile tests + smoke: SVG/PNG, relative data.url, echarts, and the chartjs+svg rejection). The change is additive and doesn’t appear to break the existing flint-chart-mcp path.

Approve with a couple of nits:

1. Binary name. I’d prefer renaming the top-level binary from flint to flint-chart. flint alone is a bit too generic and easy to collide with other tools; flint-chart matches the product/repo naming and pairs cleanly with flint-chart-mcp (flint-chart for local CLI work, flint-chart-mcp for the server). Keeping the compile subcommand is fine, e.g. flint-chart compile chart.json --format svg.
2. Docs. Please follow up (in this PR or a quick follow-up) with a short section in packages/flint-mcp/README.md documenting flint compile (basic usage, --format / --backend / -o, and how relative data.url resolves).

Overall, it's a nice fix for #107.

[Aaron Chen (chen1plus)]

Updated per your feedback, PTAL when you get a chance

[Chenglong Wang (Chenglong-MS)]

Thank you both! Merging to the dev branch to stage for the next release.

Btw, if you are feeling adventurous, you are welcome to explore some of the interactive feature we are releasing soon in the dev branch. Available in the playground once you launch the local site: http://localhost:5274/#/playground/click-focus