Tracking issue: Swift language

[leon0399]

This is a tracking issue for implementing all benchmarks in Swift.

Algorithms to implement:

• collatz/MaxSequence - #
• linpack/Linpack - Add linpack/Linpack benchmark in Swift #107
• mandelbrot/Simple - Add mandelbrot/Simple benchmark in Swift #108
• primes/Atkin - Add primes/Atkin benchmark in Swift #109
• primes/Simple - Already implemented
• recursion/Tak - Add recursion/Tak benchmark in Swift #110
• treap/Naive - Add treap/Naive benchmark in Swift #111

Each benchmark must be implemented exactly as in the reference implementations (PHP, C++, Python) without any optimizations, to ensure fair comparison across languages.