Add support for task options

Added support for customizing processors in `scripts.js` (esbuild), `styles.js` (node-sass, postcss, autoprefixer), and `svgs.js` (svg-mixer), via arguments for the exported task functions.

Added:
- Constants to decouple shared default options, options for development, and options for production.
- Constants to export default options for development and production as an array of arguments to pass to task functions.

Changed:
- watch.js to apply development args to tasks

build/tasks/concats.js

@@ -9,6 +9,8 @@ import { basename } from 'node:path';
 /**
  * Concatenates groups of files.
  *
+ * @todo Add support for minification.
+ *
  * @async
  * @return {Promise}
  */