refactor(screenreader-trap): replace recursive util functions

[ianmcburnie]

Summary

• Rewrites three recursive functions in makeup-screenreader-trap/src/util.js as iterative while loops: getPreviousSiblings, getNextSiblings, and getAllAncestors
• Eliminates the risk of stack overflow on deeply nested or large DOM trees
• The getAllAncestors helper is removed — its logic is inlined directly into getAncestors, reducing indirection
• No behaviour change; all 86 existing tests pass

Test plan

• npm run test:unit -- packages/core/makeup-screenreader-trap passes (86 tests)
• Manual smoke test: open the screenreader-trap demo and verify trap/untrap behaviour

[Copilot]

Pull request overview

This PR refactors the DOM traversal helpers in makeup-screenreader-trap to use iterative loops instead of recursion, preventing potential stack overflows on very deep DOM trees while preserving existing behavior.

Changes:

• Replaced recursive sibling-walking utilities with iterative while loops (getPreviousSiblings, getNextSiblings).
• Removed the getAllAncestors helper and inlined its logic into getAncestors using an iterative loop.
• Updated built dist outputs and the docs bundle artifacts to reflect the source changes.

Reviewed changes

Copilot reviewed 1 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/makeup-screenreader-trap/src/util.js	Converts recursive DOM traversal helpers to iterative loops and inlines ancestor collection.
packages/core/makeup-screenreader-trap/dist/mjs/util.js	Updates ESM build output for the iterative traversal changes.
packages/core/makeup-screenreader-trap/dist/cjs/util.js	Updates CJS build output for the iterative traversal changes.
docs/core/makeup-screenreader-trap/index.min.js.map	Regenerated sourcemap artifact reflecting updated bundle contents.
docs/core/makeup-screenreader-trap/index.min.js	Regenerated docs bundle reflecting updated traversal implementation.

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