Fix Automatic Message Sending Issue

[viditpandey06]

Title: Fix Automatic Message Sending Issue

Description:
This pull request addresses the issue reported by @viditpandey06 regarding the automatic sending of messages using PyWhatKit. Previously, although messages were typed into the text box, the send key was not pressed automatically or most likely pressed but not effective due to change in active window.

Changes Made:

• Implemented two functions, get_default_browser and set_foremost_process, to actively shift the window of the WhatsApp tab to an active state.
• This adjustment enables the "Enter" key to be pressed automatically, facilitating the sending of messages seamlessly.

Steps Taken:

1. Created get_default_browser function to identify the default browser.
2. Implemented set_foremost_process function to bring the WhatsApp tab to the forefront.
3. Integrated these functions into the message-sending process to ensure smooth execution.

Additional Information:

• Tested the fix on:
  • Operating System: Windows 11
  • Browsers: Microsoft Edge, Google Chrome,Firefox
  • Python Version: 3.11
  • PyWhatKit Version: 5.2

Closing Note:
This PR aims to enhance the functionality of PyWhatKit by resolving the reported issue and ensuring that messages are sent automatically without any manual intervention.