feat(maidr.show): support non-interactive standalone script

[jooyoungseo]

Currently, maidr.show() requires a local server running so it works only when executed within an interactive session.

To support non-interactive standlone execution, I suggest the following:

if __name__ == "__main__":
    # If running as a script, save HTML and open in browser
    ## save the html file as a tempfile using `maidr.save()`
    ## Open the saved tempfile in browser via `webbrowser.open(f"file://{temp_path}")`
else:
    # If running in an interactive environment, use our `maidr.show()`

If you have any better ideas, feel free to go with that way.

[SaaiVenkat]

Professor @jooyoungseo ,

Currently, I would also recommend to use maidr.save_html() to execute a python script. In order to support the standalone script, we need to provide a backend similar to what visualization libraries are using to show the plots. This requires further design analysis, as this would be a big change. I would suggest to add this as backlog, since we have the highlighting feature pending.

[SaaiVenkat]

Adding this to backlog.