fix(data-structures): support array-like inputs in BinarySearchTree.from() and RedBlackTree.from()

[tomas-zijdemans]

Fix BinarySearchTree.from() and RedBlackTree.from() for array-like objects without a mapping function. Both accept ArrayLike<T> per their signatures, yet RedBlackTree.from({ 0: 42, length: 1 }) threw TypeError: values is not iterable. Same bug in both classes, since RedBlackTree overrides from() with a copy of the parent's logic.

Convert unmapped inputs with Array.from() before insertion. Three regression tests per class cover empty inputs, sorting and deduplication, and a custom comparator. All six previously failed.

Validation:

• env -u NO_COLOR deno task ok on Deno 2.9.6: lint, formatting, browser compatibility, and all tests pass.
• Type-checked and ran the four touched files on Deno 1.46.3 as well. CI's v1.x matrix rejected the earlier as ArrayLike<U> | Iterable<U> cast, so the fix now uses the as unknown as idiom already used elsewhere in these files.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.03%. Comparing base (ca58f94) to head (6c5286a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7314   +/-   ##
=======================================
  Coverage   95.03%   95.03%           
=======================================
  Files         617      617           
  Lines       51637    51637           
  Branches     9359     9359           
=======================================
  Hits        49075    49075           
  Misses       2021     2021           
  Partials      541      541           

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