flux-md v0.11.0

Opt-in live region + root attributes + docs/demo.

• <FluxMarkdown> and mountFluxMarkdown accept className/id/role and aria-live/aria-atomic on the root. aria-live="polite" announces streamed content to screen readers (coalesces rapid updates; off by default). Covers React + the DOM mount (Web Component, Vue/Svelte/Solid).
• Docs: repo root README, a "Structured block data" guide, and a runnable Data Studio demo (sort/filter/CSV table + live TOC from block.data, mid-stream).

Full notes: packages/flux-md/CHANGELOG.md