Add --help-scalac as an alias for --scalac-help

Author: Gedochao

modules/cli-options/src/main/scala/scala/cli/commands/SharedOptions.scala

@@ -42,14 +42,15 @@ final case class SharedOptions(
   @Name("scalaBin")
   @Name("B")
     scalaBinaryVersion: Option[String] = None,
-  
+
   @Group("Scala")
   @HelpMessage("Show help for scalac. This is an alias for --scalac-option -help")
+  @Name("helpScalac")
     scalacHelp: Boolean = false,
 
   @Recurse
     snippet: SnippetOptions = SnippetOptions(),
-  
+
   @Recurse
     markdown: MarkdownOptions = MarkdownOptions(),
 

website/docs/reference/cli-options.md

@@ -1793,6 +1793,8 @@ Set the Scala binary version
 
 #### `--scalac-help`
 
+Aliases: `--help-scalac`
+
 Show help for scalac. This is an alias for --scalac-option -help
 
 #### `--extra-jars`