Port high-level withToolClasspath() overload to CLI

[bjaglin]

scalafix/scalafix-interfaces/src/main/java/scalafix/interfaces/ScalafixArguments.java

Lines 39 to 50 in aadace9

	/**
	* @param customURLs Extra URLs for classloading and compiling external rules.
	* @param customDependenciesCoordinates Extra dependencies for classloading and compiling external rules.
	* For example "com.nequissimus::sort-imports:0.5.2".
	* Artifacts will be resolved against the Scala version in the classloader
	* of the parent {@link Scalafix} instance and fetched using Coursier.
	* @throws ScalafixException in case of errors during artifact resolution/fetching.
	*/
	ScalafixArguments withToolClasspath(
	List<URL> customURLs,
	List<String> customDependenciesCoordinates
	) throws ScalafixException;

could and should be made available for CLI users, by supporting maven coordinates on top of URLs for --tool-classpath in

scalafix/scalafix-cli/src/main/scala/scalafix/internal/v1/Args.scala

Lines 161 to 164 in 9c282a5

	@Description(
	"Additional classpath for compiling and classloading custom rules, as a set of filesystem paths, separated by ':' on Unix or ';' on Windows."
	)
	toolClasspath: URLClassLoader = ClasspathOps.thisClassLoader,