Support $omitKeys for arrays of objects

[benny779]

Currently, $omitKeys(object, keys[]) works only when the input is a single object. However, in many real-world use cases, data is often represented as an array of objects, requiring users to manually map over the array to apply $omitKeys to each item.

Problem

Given an input like:

[
  { "a": 1, "b": 2 },
  { "a": 3, "b": 4 }
]

Users currently need to write::

$map(data, function($v) { $omitKeys($v, ["b"]) })

or

data.$omitKeys($, ["b"])

Proposed Enhancement

Allow $omitKeys to accept an array of objects as input and apply the omission to each element automatically.

Example:

$omitKeys(data, ["b"])

####Expected Output:

[
  { "a": 1 },
  { "a": 3 }
]