tests: add Swift and Python bytecode samples

[dukecat0]

• Swift code was created by me manually.
• Python bytecode is generated using the following code:

import py_compile
py_compile.compile('fib.py')  

fib.py:

def fib(n):
    if n <= 1:
        return n
    else:
        return fib(n-1) + fib(n-2)

print(fib(10))

Related to #662

[gemini-code-assist]

Code Review

This pull request adds a new Swift test sample. The code is simple and serves its purpose as a basic test file. I've made a couple of suggestions to improve the Swift code by removing an unused import and adding a final newline, which are common best practices.

The pull request title and description also mention adding a Python bytecode sample, but I don't see any bytecode file in the changes. Please ensure all intended files are included in the pull request.

[reyammer]

Merged, thanks!