* GH-3557: Add maxDepth, dirPredicate to FileReadMS Fixes https://github.com/spring-projects/spring-integration/issues/3557 * Expose a `watchMaxDepth` on the `FileReadingMessageSource` for its `Files.walkFileTree()` API usage * Add `watchDirPredicate` option ot the `FileReadingMessageSource` to skip sub-tree for `Files.walkFileTree()` scanning according to some condition against directory `Path` * Fix language in docs Co-authored-by: Gary Russell <grussell@vmware.com> --------- Co-authored-by: Gary Russell <grussell@vmware.com>