Allow admins to switch live mode on/off

Added live mode configuration option with checkbox in admin settings. When disabled, donations will be processed in test mode. Implemented as requested.

@vinayakmk47 thank you for your contribution!

I've reviewed the code, and it looks great overall, but I have a few suggestions and changes to align it with Drupal's coding standards and best practices:

Comment Style

Please ensure all comments end with a full stop. This is a requirement for Drupal's coding standards.

Indentation and Trailing Spaces

Please check the indentation, especially around Line 42 of /fundraiseup_js.module. Also, remove any trailing spaces, such as those on Line 43.

(running the code through PHP Code Sniffer (phpcs) with Drupal standards will help to catch any formatting or style issues like these.)

Simplify the sprintf Usage

I think that using sprintf function for the live mode variable is unnecessary. Instead, we can directly interpolate the value, e.g.:

'window.fundraiseup_livemode = ' . ($live_mode ? 'true' : 'false') . ';'

We could perhaps cast the live_mode value to a boolean when fetching it from configuration. For example:

$live_mode = (bool) ($config->get('live_mode') ?? TRUE);

Redundant JS Line?

There’s a line in the JavaScript:

window.fundraiseup_livemode = drupalSettings.fundraiseUpJS?.liveMode ?? true;

This seems redundant since we’re already attaching the live mode declaration via a script tag. Is it needed?

Let me know if you need further clarification or help with these updates. Thanks again for your contribution!

@leo pitt I have made changes according to the above mentioned comments Please review it and let me know if there are any further changes i have to make.

Thanks @vinayakmk47. I have made one small update to indentation. Otherwise, this is good.

Thanks, @leo pitt, for your feedback and for making the indentation update! I appreciate your review and confirmation that the changes are good. Let me know if there's anything else you'd like me to address.

No problem, great work @vinayakmk47 and thanks for the contribution.