feat: convert flat array objects into tree like data - #494
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Closes sodiray#399. Add listToTree(items, {idKey='id', parentKey='parent', childrenKey='children'}) that returns the root nodes of a tree: each item is cloned with an empty children array (inputs are not mutated), children are attached to their parent by id, and items whose parent reference is missing/null or points to a non existent node become roots. Preserves input order within children lists. Supports custom key names and numeric/string ids.
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Closes #399.
Add listToTree(items, {idKey='id', parentKey='parent', childrenKey='children'}) that returns the root nodes of a tree: each item is cloned with an empty children array (inputs are not mutated), children are attached to their parent by id, and items whose parent reference is missing/null or points to a non existent node become roots. Preserves input order within children lists. Supports custom key names and numeric/string ids.