adds core.extension.yml and field_settings config

[markconroy]

Fixes #34

[stephen-cox]

The config/install/field_ui.settings.yml file should be removed. We also need to add modules not already required by other modules to the composer file. I can look at this later today

[stephen-cox]

We don't want to set this for everyone. It would be better if we use config overrides to set this. You can do this by adding the following to one of the sites settings.lando.php (or similar) files.

$config['field_ui.settings']['field_prefix'] = 'lgms_';

[markconroy]

@stephen-cox are you okay to make the change you requested above while looking at this PR?

If adding new modules, can you also add twig_tweak to the composer.json file?

[stephen-cox]

@markconroy A better way to enable modules during an install is to add them to the profiles info.yml file. I have removed the config file and added modules to the localgov_microsites.info.yml file.

How does this look to you?

[markconroy]

Looks good, but we'll need to add twig_tweak to the composer.json. After that, all good to merge.

[markconroy]

Sorry, just seen that twig_tweak was adding in another PR. This looks good to me now.