Support for calling other macros as shown in the Bun example

[herkulano]

Clear and concise description of the problem

Currently the Bun example doesn't work, arguments can only be literal strings, objects and arrays in unplugin-macros.

import {getText} from './getText.ts' with { type: 'macro' };
import {getFoo} from './getFoo.ts' with { type: 'macro' };

export function howLong() {
  // this works because getFoo() is statically known
  const foo = getFoo();
  const text = getText(`https://example.com/${foo}`);
  console.log("The page is", text.length, "characters long");
}

Suggested solution

Support macro functions as arguments. Not sure if the implementation of #12 would solve this.

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[sxzz]

#12 should fix this, but I haven't found a good solution for this feature.