feat: support objects in remaining dot array helpers

[michalsn]

Description
This PR replaces #10269. It extends the remaining dot-path helpers so dot_array_has(), dot_array_only(), and dot_array_except() can read through array-like object values while keeping the existing array return contract for projection helpers.

The code now uses one lookup path for arrays and objects. It preserves keys from traversable objects and does not convert objects that are not part of the requested path. If an object is returned or left untouched, it stays an object. If only part of an object is selected or removed, that part is returned as an array.

Supersedes #10269
Closes #10225

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value (without duplication)
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide