I'll be happy to help during tomorrow's hackathon. 🤘 In the meantime, all I'll say is

<umb-property>

and

<umb-property-editor>

are your friends. e.g. https://github.com/leekelleher/umbraco-contentment/blob/4.2.0/src/Umbraco.Community.Contentment/DataEditors/ConfigurationEditor/configuration-editor.inline.html#L17-L19 ...and

<umb-code-snippet language="'JSON'">{{model | json}}</umb-code-snippet>

is pretty sweet too!