azjezz / psl / 18741489969

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feat: add Tree component for hierarchical data structures

Introduces a new `Tree` component providing immutable tree data structures
and functional operations for hierarchical data manipulation.

Architecture:
- NodeInterface<T>: Base interface with getValue()
- LeafNode<T>: Immutable leaf nodes (no children)
- TreeNode<T>: Immutable tree nodes with getChildren()
- Pure constructor functions: tree() and leaf()

Features:
- Transformation operations: map, filter, reduce, fold
- Traversal algorithms: pre_order, post_order, level_order
- Search functions: find, any, all, contains
- Utility functions: count, depth, is_leaf, leaves
- Path operations: path_to, at_path
- Array conversion: from_array, to_array

Signed-off-by: azjezz <azjezz@protonmail.com>

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