✨ Enhance the Communications code snippets

[yashksaini-coder]

✅ Fixes: #327

This pull request includes significant updates to the send_email function, its documentation, and related tests. The changes enhance error handling, logging, and input validation, and also update the tests to reflect these improvements.

Enhancements to send_email function:

• Added logging for better error tracking and information (pysnippets/Communication/send_email.py).
• Introduced input validation to ensure all required parameters are provided (pysnippets/Communication/send_email.py).
• Replaced print statements with logging for consistent error and success messages (pysnippets/Communication/send_email.py).

Documentation updates:

• Corrected the spelling of "recipient" in the function parameters and documentation (pysnippets/Communication/communication.md). [1] [2]
• Added content_type parameter to allow sending emails in plain text or HTML format (pysnippets/Communication/communication.md). [1] [2]

Test updates:

• Rewrote tests to align with the updated send_email function, including tests for successful email sending, authentication errors, connection errors, and missing parameters (Tests/Communication/test_send_email.py).

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@UTSAVS26 can you review this PR, and add proper labels to it

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