What problem does this feature solve?

Currently, Rspack config.module.parser.asset.dataUrlCondition only support object.
We can't compute the dataUrlCondition.maxSize by function.

What does the proposed API of configuration look like?

Align webpack, Module.parser.asset.dataUrlCondition support function.

module.exports = {
  module: {
    parser: {
      asset: {
        dataUrlCondition: (source, { filename, module }) => {
          return condition(source)
        }
      },
    },
  },
};