fix(cli): honor overflow opt-out for clipped text

[miguel-heygen]

What

• make clipped_text honor data-layout-allow-overflow
• add regression coverage for text containers with intentionally bleeding decorative children

Why

A scene containing its own text plus a 50px bleeding/Ken Burns background child inflated the scene's scrollWidth. Even with data-layout-allow-overflow, the layout audit emitted clipped_text errors because that specific diagnostic skipped the shared overflow opt-out used by container and canvas overflow checks. Snapshots and a tolerance sweep confirmed the text itself was not clipped.

How

Return early from clippedTextIssue() when the element or an ancestor carries data-layout-allow-overflow, matching the existing behavior of the other overflow diagnostics.

Test plan

• added a failing regression fixture with an overflow-hidden text container, 100px decorative bleed, and data-layout-allow-overflow
• verified the test failed before the fix and now passes
• bun run --filter @hyperframes/cli test -- --run src/commands/layout-audit.browser.test.ts (31 passed)
• bunx oxlint packages/cli/src/commands/layout-audit.browser.js packages/cli/src/commands/layout-audit.browser.test.ts
• bun run --filter @hyperframes/cli typecheck
• pre-commit lint, format, fallow, and typecheck hooks passed