STYLE: add usage notes to more utilities and solvers

applications/utilities/preProcessing/wallFunctionTable/wallFunctionTable.C

@@ -39,6 +39,11 @@ Description
 
 int main(int argc, char *argv[])
 {
+    argList::addNote
+    (
+        "Generates a table suitable for use by tabulated wall functions"
+    );
+
     #include "setRootCase.H"
     #include "createTime.H"
     #include "createNamedMesh.H"