feat (@jitsu/js): Add support for tracking additional cookies via cookieCapture config

[dmeremyanin]

This PR introduces a new optional cookieCapture property to allow tracking of additional cookies beyond the default ones.

The following cookies were already being tracked by default before this change:

• Facebook: _fbc, _fbp
• Google Analytics 4: GA4 client ID.

The cookieCapture property allows to specify a custom list of cookies to track. It accepts a Record<string, string>, where the keys are cookie names and the values are their corresponding values.

Example usage:

window.jitsuConfig = {
  cookieCapture: {
    ttp: "_ttp", // Custom cookie to capture
  }
};

Related discussion: #1109 (comment)

[dmeremyanin]

Hey @vklimontovich, just wanted to make sure you saw this PR (and the others). We’d really love to see this change in upstream. Please let me know if you have any questions or need any changes. Thanks

[dmeremyanin]

@absorbb thanks for the merge! I've seen errors from Prettier in the main branch and will investigate them now.

[dmeremyanin]

Fixed formatting errors in #1159.