feat: support subproperties as a title

[smacker]

This change allows setting a sub property as a title of resource.

For example:

      resource: {
        model: getModelByName('Sport'),
        client: prisma,
      },
      options: {
        titleProperty: 'translation.en',
        listProperties: ['translation.ja', 'translation.en'],
        properties: {
          translation: { type: 'mixed' },
          'translation.ja': { type: 'string' },
          'translation.en': { type: 'string' },
          // some other props
        },
      },

In master branch such titleProperty is just ignored which is an unexpected behavior.

[dziraf]

@smacker Thanks, I'll merge this. Using the helper method actually makes more sense here.

[github-actions[bot]]

:tada: This PR is included in version 7.8.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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