Add support to view inherited members #2342

The reference view API is used to show the document outline with inherited
symbols using the new java.ls extension method.

Signed-off-by: Gayan Perera <[email protected]>

Author: gayanper

package.json

@@ -1150,6 +1150,11 @@
         "command": "_java.learnMoreAboutCleanUps",
         "title": "Learn more about Java Clean Ups",
         "category": "Java"
+      },
+      {
+        "command": "java.action.showExtendedOutline",
+        "title": "%java.action.showExtendedOutline%",
+        "category": "Java"
       }
     ],
     "keybindings": [
@@ -1364,4 +1369,4 @@
     "winston": "^3.2.1",
     "winston-daily-rotate-file": "^3.10.0"
   }
-}
+}

package.nls.json

@@ -22,5 +22,6 @@
 	"java.action.showSupertypeHierarchy": "Show Supertype Hierarchy",
 	"java.action.showSubtypeHierarchy": "Show Subtype Hierarchy",
 	"java.action.changeBaseType": "Base on this Type",
-	"java.project.createModuleInfo.command": "Create module-info.java"
-}
+	"java.project.createModuleInfo.command": "Create module-info.java",
+	"java.action.showExtendedOutline": "Open Extended Outline"
+}