[FL-1419] new iButton cli (#521)

* iButton, helpers: add destructor
* iButton app: new approach to cli commands, cli read
* iButton app: cli write
* iButton app: cli emulate
* iButton app: remove old cli commands
* iButton app: use unique_ptr for worker
* iButton app: remove obsolete cli help
* iButton app: fix help and key type parsing

applications/ibutton/helpers/key-writer.cpp

@@ -5,6 +5,10 @@ KeyWriter::KeyWriter(OneWireMaster* _onewire_master) {
     onewire_master = _onewire_master;
 }
 
+KeyWriter::~KeyWriter() {
+    stop();
+}
+
 KeyWriter::Error KeyWriter::write(iButtonKey* key) {
     return write_internal(key);
 }