Add rule: multiline_arguments_threshold

[kj6dev]

Overview

Functions with 4+ parameters should have each parameter on its own line.

Rule Identifier

multiline_arguments_threshold

Rationale

Improves readability and maintainability.

Example

// ❌ Hard to read
func configure(name: String, age: Int, address: String, phone: String) { }

// ✅ Clear and scannable
func configure(
    name: String,
    age: Int,
    address: String,
    phone: String
) { }

Notes

SwiftFormat may already handle this - verify before implementing to avoid duplication.

Priority

Low