[Feature 🔨]: Support `Exclude`ing of iterators via methods

[BooleanCat]

Is your feature request related to a problem? Please describe.

Excludeing an iterator is achieved by using the iter package's Exclude function. This can lead to deeply nested code that can be difficult to read. The issue belongs to a series of issues that remedy that problem. See #55 for more details.

Describe the solution you'd like

Each iterator should allow Excludeing via a method rather than the function iter.Exclude.

For example, this test:

func ExampleExclude() {
    filtered := iter.Exclude[int](iter.Lift([]int{0, 1, 0, 2}), filters.IsZero[int]).Collect()
    fmt.Println(filtered)
    // Output: [1, 2]
}

Could instead read like:

func ExampleFilter() {
    filtered := iter.Lift([]int{0, 1, 0, 2}).Exclude(filters.IsZero[int]).Collect()
    fmt.Println(filtered)
    // Output: [1 2]
}

Does this incur a breaking change?

No.

Do you intend to build this feature yourself?

No - I'd like to offer this to first-time contributors ideally.

Checklist

• [ ] Implement .Exclude(filter) on each BaseIter
• [ ] Add a simple test for this (don't test extensively, Exclude is already comprehensively tested elsewhere).
• [ ] Update any Example... tests or README references to Exclude to use the method.

See #57 for an example of where this was implemented for Collect.

[BooleanCat]

This is being picked up by @William-Young-97