NewZipPluginDecoderWithSizeLimit is a helper function to create a ZipPluginDecoder with a size limit It checks the total uncompressed size of the plugin package and returns an error if it exceeds the max size.

VerifyPlugin is a function that verifies the signature of a plugin It takes a plugin decoder and verifies the signature.

PluginDecoder is an interface for decoding and interacting with plugin files.