Define interfaces for inline call handlers and BRK

Instead of providing no-op CheckJsr/CheckJsl, plugins now declare
which calls they support by defining interfaces on the plugin class.

I added a CheckBrk call for code like Apple /// SOS calls, which
use BRK as an OS call mechanism.  The formatting doesn't work quite
right yet because I've been treating BRK as a two-byte instruction.
Hardly anything else does, and I think it's time I stopped (but not
in this commit).

Note: THIS BREAKS ALL PLUGINS that use the inline JSR/JSL feature,
which is pretty much all of them.

SourceGen/SGTestData/2011-hinting.cs

@@ -7,7 +7,7 @@ using System.Collections.Generic;
 using PluginCommon;
 
 namespace RuntimeData.Test2011 {
-    public class Test2011 : MarshalByRefObject, IPlugin {
+    public class Test2011 : MarshalByRefObject, IPlugin, IPlugin_InlineJsr {
         private IApplication mAppRef;
         private byte[] mFileData;
 
@@ -32,9 +32,5 @@ namespace RuntimeData.Test2011 {
                     DataSubType.None, null);
             }
         }
-
-        public void CheckJsl(int offset, out bool noContinue) {
-            noContinue = false;
-        }
     }
 }