added -c -config parser argument

[pbelokon]

Acceptance criteria for the feature:

• The -c or --config flags accept a file path to a TOML-based config file.
• If the file is missing, or can't be parsed as TOML, exit with an appropriate error message.
• If the -c or --config option is provided, ignore all other options (i.e., a config file overrides other options on the command line).
• The program should ignore any options in the config file it doesn't recognize. For example, if the app doesn't support stylesheets, ignore a stylesheet property.
• If the config file is missing any options, assume the usual defaults.
• User is able to pass TOML file and it applies to HTML

[pbelokon]

@Rachit1313 just wanted to ask you to do a quick review of my changes, and tell me if i should change anything.

[Rachit1313]

Hi,
Thank you for the implementation.
Could you also update the documentation on this?

Thank you

[Rachit1313]

I checked your code changes and its good. Once you make the changes in the documentation, I will be merging this pull request after reviewing it.

[pbelokon]

Thanks, sure I ll update this pr tomorrow

[pbelokon]

@Rachit1313 I committed some changes to the README could you check it out

[Rachit1313]

Thank you for your PR. Merged.