Creating screenshots of all elements, not only screens

[AviPaperno]

Background:
Currently, when using Wokwi-CLI for testing, many modules—such as led-matrix or neopixels—cannot be properly tested because the take-screenshot command only supports capturing the entire display buffer. This limitation reduces the range of tests that can be automated and makes it difficult to validate the visual output of specific components.

Suggestion:
Please add functionality to the take-screenshot command to allow capturing screenshots of individual components (e.g., led-matrix, neopixels) or a user-defined region, not just the full display buffer.

Benefit:
This feature would enable more granular automated tests and validation of specific modules, improving the quality and coverage of test suites.

Additional:
I have implemented a similar solution using Selenium to capture specific areas, so may be my solution can help
Here is link: https://discord.com/channels/787627282663211009/1374193521174511686