Add missing reference docs for *.javaProperty directives

Author: Gedochao

modules/directives/src/main/scala/scala/build/preprocessing/directives/JavaProps.scala

@@ -14,8 +14,10 @@ import scala.cli.commands.SpecificationLevel
 @DirectiveUsage(
   "//> using javaProp _key=val_",
   """`//> using javaProp` _key=value_
-    |
     |`//> using javaProp` _key_
+    |
+    |`//> using test.javaProp` _key=value_
+    |`//> using test.javaProp` _key_
     |""".stripMargin
 )
 @DirectiveDescription("Add Java properties")

website/docs/reference/directives.md

@@ -195,9 +195,11 @@ Add Java options which will be passed when running an application.
 Add Java properties
 
 `//> using javaProp` _key=value_
-
 `//> using javaProp` _key_
 
+`//> using test.javaProp` _key=value_
+`//> using test.javaProp` _key_
+
 
 #### Examples
 `//> using javaProp foo1=bar foo2`

website/docs/reference/scala-command/directives.md

@@ -90,9 +90,11 @@ Add Java options which will be passed when running an application.
 Add Java properties
 
 `//> using javaProp` _key=value_
-
 `//> using javaProp` _key_
 
+`//> using test.javaProp` _key=value_
+`//> using test.javaProp` _key_
+
 
 #### Examples
 `//> using javaProp foo1=bar foo2`