a string that contains a comma-separated list of settings for configuring the svgo plugin
The function getSvgoPluginOptions returns a string of SVGO plugin settings if the format
parameter is .svg, otherwise it returns undefined. The plugins parameter is optional and if it
is not provided, the function returns a default set of SVGO plugins for cleaning up SVG attributes,
removing doctype, and removing XML processing instructions.
The function returns a set of settings for an SVGO plugin based on the input format and plugins. optimizing SVG files. If it is undefined, the function will use a default set of plugins.