ENH: added ZoneMesh indices(), selection() with wordRes matcher

- rationalized code dealing with extraction of name or indices from
  coordinateSystems, polyBoundaryMesh, faBoundaryMesh, fvBoundaryMesh,
  ZoneMesh to use internal implementations that allow direct
  searching/matching without building an intermediate list of names.

- simpler and more efficient handling of patch group matching.

src/sampling/sampledSurface/sampledPlane/sampledPlane.C

@@ -177,7 +177,10 @@ bool Foam::sampledPlane::update()
     }
 
 
-    labelList selectedCells(mesh().cellZones().findMatching(zoneKey_).toc());
+    labelList selectedCells
+    (
+        mesh().cellZones().selection(zoneKey_).sortedToc()
+    );
 
     bool fullMesh = returnReduce(selectedCells.empty(), andOp<bool>());
 

src/sampling/surfMeshSample/plane/surfMeshSamplePlane.C

@@ -175,7 +175,7 @@ bool Foam::surfMeshSamplePlane::update()
 
     labelList selectedCells
     (
-        mesh().cellZones().findMatching(zoneKey_).sortedToc()
+        mesh().cellZones().selection(zoneKey_).sortedToc()
     );
 
     bool fullMesh = returnReduce(selectedCells.empty(), andOp<bool>());