Enhanced transform functionality to include compression

[mindflowgo]

Added 'compress' method to transform, and uses zlib to compress target files (with (zlib: gzip, brotli, deflate).

Usage example:

viteStaticCopy({
            targets: [ 
              { src: 'images/*.svg', dest: 'assets', transform: { compress: 'gzip' }
               }]
          }),

[changeset-bot]

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Latest commit: e729953

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[sapphi-red]

I would like to avoid taking this responsibility into this plugin. I think it's better to make this plugin work well with other post-process plugins.
One idea is to expose a function that returns all the file paths that would be written.

[mindflowgo]

Makes sense!