Bugfix/cross platform console input

[Marconiadsf]

This pull request addresses a critical portability bug in the record_audio.py utility that prevented the application from running correctly on Windows.

Problem:
The original implementation used select.select([sys.stdin], [], [], 0.1)[0] to detect Enter key presses. This function is Unix-specific and resulted in an OSError: [WinError 10038] "Foi tentada uma operação em algum item que não é um soquete" on Windows systems, causing the application to crash during audio recording initialization.

Solution:
A new helper function, wait_for_enter(), has been introduced in record_audio.py. This function provides a cross-platform solution for console input detection:

• On Windows (os.name == 'nt'), it utilizes the msvcrt module (msvcrt.kbhit() and msvcrt.getch()) to reliably detect the Enter key.
• On Unix-like systems (Linux, macOS), it continues to use the existing select.select() mechanism, which is appropriate for those environments.

The record_audio() function now calls wait_for_enter() to handle the input, ensuring that the application can start and stop recording correctly across all supported operating systems.

Testing:

• Verified local functionality on a Windows environment, where the OSError no longer occurs, and Enter key presses are correctly detected.
• The core audio recording logic remains unchanged.