feature: Support configuring the max line length

[bicyclespokesperson]

It would be great to be able to set the MaxLineLength via a parameter to the CompareJson function. Having it hard-coded to 50 is a reasonable default, but some apps have a lot of horizontal space and don't want to wrap the JSON as frequently.

	diff, err := jsonDiff.CompareJSON(json1, json2, nil, false)

I don't know the project well enough to propose an API (Could be a MaxLineLength function parameter, or a settings struct to support more options in a backwards compatible manner). But if someone else suggests a good api, I'm happy to implement this.

[kayden-vs]

Hey, I'd like to work on this issue. I've analyzed the codebase and here's my proposed approach:

Implementation Plan:

1. Add an Options struct with a MaxLineLength field (default: 50)
2. Add a new CompareJSONWithOptions() function that accepts this struct
3. Keep the existing CompareJSON() signature unchanged for backward compatibility
4. Thread the maxLineLength value through internal functions (breakLines, breakWithColor, etc.)
5. Extend the same pattern to Compare() and CompareHeaders() if needed

Example API:

// Existing API still works
diff, err := jsonDiff. CompareJSON(json1, json2, nil, false)

// New API with options
diff, err := jsonDiff.CompareJSONWithOptions(json1, json2, nil, &jsonDiff.Options{
    MaxLineLength: 100,
})