More module decomposition.

Needs much more on device testing.

esp32/optional/serial-bluetooth/serial-bluetooth.fs

@@ -0,0 +1,23 @@
+\ Copyright 2023 Bradley D. Nelson
+\
+\ Licensed under the Apache License, Version 2.0 (the "License");
+\ you may not use this file except in compliance with the License.
+\ You may obtain a copy of the License at
+\
+\     http://www.apache.org/licenses/LICENSE-2.0
+\
+\ Unless required by applicable law or agreed to in writing, software
+\ distributed under the License is distributed on an "AS IS" BASIS,
+\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+\ See the License for the specific language governing permissions and
+\ limitations under the License.
+
+DEFINED? SerialBT.new [IF]
+  vocabulary bluetooth   bluetooth definitions
+  transfer bluetooth-builtins
+  forth definitions
+[ELSE]
+  internals definitions
+  transfer bluetooth-builtins
+  forth definitions
+[THEN]