Add 'chunks' subcommand to binary common commands (#2089)

Author: samoylovfp

lang-guide/chapters/types/basic_types/binary.md

@@ -23,3 +23,4 @@
 - `bytes` subcommands (see `help bytes` for a list)
 - `encode`
 - `take`
+- `chunks` to split binary into individual bytes or groups